dissertation root word meaning

thesis (n.)

late 14c., "unaccented syllable or note, a lowering of the voice in music," from Latin thesis "unaccented syllable in poetry," later (and more correctly) "stressed part of a metrical foot," from Greek thesis "a proposition," also "downbeat" (in music), originally "a setting down, a placing, an arranging; position, situation" (from reduplicated form of PIE root *dhe- "to set, put").

The sense in logic of "a formulation in advance of a proposition to be proved or debated" is attested by 1570s (contrasted to hypothesis ; in rhetoric it is opposed to antithesis ); that of "dissertation presented by a candidate for a university degree" is from 1650s. The uncertainty of the prosodic sense might have kept it from being established in English. Related: Thetic ; thetical ; thetically .

Entries linking to thesis

*dhē- , Proto-Indo-European root meaning "to set, put."

It forms all or part of: abdomen ; abscond ; affair ; affect (v.1) "make a mental impression on;" affect (v.2) "make a pretense of;" affection ; amplify ; anathema ; antithesis ; apothecary ; artifact ; artifice ; beatific ; benefice ; beneficence ; beneficial ; benefit ; bibliothec ; bodega ; boutique ; certify ; chafe ; chauffeur ; comfit ; condiment ; confection ; confetti ; counterfeit ; deed ; deem ; deface ; defeasance ; defeat ; defect ; deficient ; difficulty ; dignify ; discomfit ; do (v.); doom ; -dom ; duma ; edifice ; edify ; efface ; effect ; efficacious ; efficient ; epithet ; facade ; face ; facet ; facial ; -facient ; facile ; facilitate ; facsimile ; fact ; faction (n.1) "political party;" -faction ; factitious ; factitive ; factor ; factory ; factotum ; faculty ; fashion ; feasible ; feat ; feature ; feckless ; fetish ; -fic ; fordo ; forfeit ; -fy ; gratify ; hacienda ; hypothecate ; hypothesis ; incondite ; indeed ; infect ; justify ; malefactor ; malfeasance ; manufacture ; metathesis ; misfeasance ; modify ; mollify ; multifarious ; notify ; nullify ; office ; officinal ; omnifarious ; orifice ; parenthesis ; perfect ; petrify ; pluperfect ; pontifex ; prefect ; prima facie ; proficient ; profit ; prosthesis ; prothesis ; purdah ; putrefy ; qualify ; rarefy ; recondite ; rectify ; refectory ; sacrifice ; salmagundi ; samadhi ; satisfy ; sconce ; suffice ; sufficient ; surface ; surfeit ; synthesis ; tay ; ticking (n.); theco- ; thematic ; theme ; thesis ; verify .

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dadhati "puts, places;" Avestan dadaiti "he puts;" Old Persian ada "he made;" Hittite dai- "to place;" Greek tithenai "to put, set, place;" Latin facere "to make, do; perform; bring about;" Lithuanian dėti "to put;" Polish dziać się "to be happening;" Russian delat' "to do;" Old High German tuon , German tun , Old English don "to do."

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Root Words | Definition, List & Examples

Published on September 13, 2023 by Kassiani Nikolopoulou .

A root word is the most basic form of a word that cannot be further divided into meaningful segments. Root words are used to form new words by adding letters at the beginning (i.e., a prefix) and/or the end (i.e., a suffix).

For example, the word “unfaithful” is made up of these different parts:

prefix        root word     suffix

By adding a suffix and/or a prefix to a root word like “faith,” we can make other words such as “faithful,” “faithfully,” “unfaithful,” and “unfaithfully . ” These words are linked both in terms of spelling and meaning and are called a word family .

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Table of contents

What are root words, example root words, latin root words (free downloadable list), greek root words (free downloadable list), worksheet: root words, frequently asked questions about root words.

A root word is the fundamental unit of a word. A root word has nothing added at the beginning or the end. While some root words are standalone words in English, others need a prefix (like “anti-” or “un-”) and/or a suffix (like “-able” or “-ist”) to create a meaningful word.

For example, “cede” is a root word for other words like “recede” or “precedent,” but it is also a word on its own (meaning “to give up”). On the other hand, the root word “struct” does not constitute an understandable word in itself and other letters need to be added for it to make sense (e.g, “instructor,” “destruction,” “structural”).

Many words are created from Latin or Greek root words and usually cannot function as standalone words in English. For example, “chrono” comes from Greek and is the root of words like “chronology,” “synchronize,” and “chronic,” but it’s not a separate word in English.

Learning about root words can help you work out the meaning of new or longer words. When you know how to decode unknown words by identifying their root words and affixes (i.e., the prefix or suffix attached to them), you can navigate more complex or specialized texts. For example, many root words derived from Latin and Greek are common in math and science terminology, like “centi” (“hundred”) or “geo” (“earth”).

• When added at the beginning of the word, they are called prefixes . Common prefixes include: “an-” (“without”), anti- (“against”), “hyper-” (“over”), “non-” (“lack of”), “pre-” (“before”), and “post-” (“after”).
• When added at the end of the word, they are called suffixes . Common suffixes include: “-acy” (“state or quality”), “-able/-ible” (“capable of”), “-al” (“pertaining to”), “-ic/-ical” (“having the form”), and “-less” (“without”).

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Some root words can be used independently, while others need to be combined with a prefix (i.e., letters at the beginning), a suffix (i.e., letters at the end) or another root word (e.g., -logue) to form a standalone word.

Root words vs. base words

The terms root words and base words are often used interchangeably. However, they are not exactly the same. While root words cannot always be used as standalone words in English, base words can be used on their own or combined with other words or letters to create complex words.

For example, “code” is a base word that can be used independently or to create other words like “barcode,” “decode,” or “codify.” On the other hand, the root word “aud” (which comes from Latin) cannot be used by itself and has to be combined with other letters to form words like “auditorium,” “audition,” and “audible.” Because many root words are of Latin or Greek origin, they don’t make sense as independent words in English.

Sometimes, root words and base words overlap. For example, the word “act” is a root word of Latin origin, but also a standalone word in English. By adding a prefix or suffix, we get new words like “reaction,” “exact,” and “actor.” In this case, “act” is both a root word and a base word.

Below is a list containing common Latin root words, their meaning, and examples of words based on each root. You can also download this list in the format of your choice below.

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Below is a list containing common Greek root words, their meaning, and examples of words based on each root. You can also download this list in the format of your choice below.

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Base words can stand alone, but can also be combined with other letters to create new words.

Want to test your understanding of root words? Try the worksheet below. In each sentence, see if you can identify the root word(s) of the highlighted word.

• Answers & explanation
• The hotel lost our reservation, and the receptionist was really unhelpful .
• We came to a unanimous decision that more staff is needed during peak hours.
• ANOVA is an abbreviation of “Analysis of Variance”.
• My father is agnostic when it comes to religious matters.
• One of the three aqueducts supplying water to the Los Angeles area is from the Colorado River.
• The root word is help . The word “unhelpful” is made of three parts: “un-” (prefix), ”help” (root word), and “ful” (suffix).
• The root word is anim . The word “unanimous” is made of two parts: “unus” (meaning “one” in Latin) and “animus” (meaning “spirit” or “mind” in Latin).
• The root word is brev . The word “abbreviation” comes from Latin “ad” (prefix meaning “to”) and “breviare” (“shorten”), from brevis (“short”).
• The root word is gnost . The word “agnostic” is made of three parts: “a” (prefix meaning “not” or “without”), “gnost” (root word meaning “to know” in Greek) and “ic” (suffix).
• This word contains two Latin root words: aqua (“water”) and duct (“to lead”).

Although there is no particular rule for finding the root of a word, one way to do this is to check if the word has any affixes (suffix and/or prefix) added to it.

For example, the word “hyperactive” has the prefix “hyper-” (meaning “over”) and the suffix “-ive” (meaning “having the nature of”). If we remove the affixes, we get the root word (“act”).

The root word “dorm” means “sleep” in Latin. So words with this root word will have a meaning related to sleep. For example, the words “dormant,” “dormitory,” and “dormouse” all come from the same root word.

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• 1.1 Etymology
• 1.2 Pronunciation
• 1.3.1 Derived terms
• 1.3.2 Related terms
• 1.3.3 Translations
• 1.4 References
• 1.5 Further reading
• 1.6 Anagrams
• 2.1 Etymology
• 2.2 Pronunciation
• 3.1 Etymology
• 3.2 Pronunciation
• 3.3.1 Declension
• 3.3.2 Descendants
• 3.4 References

From Late Middle English thesis ( “ lowering of the voice ” ) [1] and also borrowed directly from its etymon Latin thesis ( “ proposition, thesis; lowering of the voice ” ) , from Ancient Greek θέσῐς ( thésis , “ arrangement, placement, setting; conclusion, position, thesis; lowering of the voice ” ) , from τῐ́θημῐ ( títhēmi , “ to place, put, set; to put down in writing; to consider as, regard ” ) [2] [3] (ultimately from Proto-Indo-European *dʰeh₁- ( “ to do; to place, put ” ) ) + -σῐς ( -sis , suffix forming abstract nouns or nouns of action, process, or result ) . The English word is a doublet of deed .

Sense 1.1 (“proposition or statement supported by arguments”) is adopted from antithesis . [2] Sense 1.4 (“initial stage of reasoning”) was first used by the German philosopher Johann Gottlieb Fichte (1762–1814), and later applied to the dialectical method of his countryman, the philosopher Georg Wilhelm Friedrich Hegel (1770–1831).

The plural form theses is borrowed from Latin thesēs , from Ancient Greek θέσεις ( théseis ) .

Pronunciation

• ( Received Pronunciation ) IPA ( key ) : /ˈθiːsɪs/ , ( archaic ) /ˈθɛsɪs/

• ( General American ) IPA ( key ) : /ˈθisɪs/
• Rhymes: -iːsɪs
• Hyphenation: the‧sis
• ( Received Pronunciation ) IPA ( key ) : /ˈθiːsiːz/
• ( General American ) IPA ( key ) : /ˈθisiz/
• Rhymes: -iːsiːz
• Hyphenation: the‧ses

thesis ( plural theses )

• ( rhetoric ) A proposition or statement supported by arguments .
• 1766 , [ Oliver Goldsmith ], “The Conclusion”, in The Vicar of Wakefield:   [ … ] , volume II, Salisbury, Wiltshire: [ … ] B. Collins, for F [ rancis ] Newbery ,   [ … ] , →OCLC ; reprinted London: Elliot Stock , 1885 , →OCLC , pages 218–219 : I told them of the grave, becoming, and ſublime deportment they ſhould aſſume upon this myſtical occaſion, and read them two homilies and a theſis of my own compoſing, in order to prepare them.
• ( mathematics , computer science ) A conjecture , especially one too vague to be formally stated or verified but useful as a working convention.
• ( logic ) An affirmation , or distinction from a supposition or hypothesis .
• ( philosophy ) In the dialectical method of Georg Wilhelm Friedrich Hegel : the initial stage of reasoning where a formal statement of a point is developed ; this is followed by antithesis and synthesis .
• ( music , prosody , originally ) The action of lowering the hand or bringing down the foot when indicating a rhythm ; hence, an accented part of a measure of music or verse indicated by this action; an ictus , a stress . Antonym: arsis
• ( music , prosody , with a reversal of meaning ) A depression of the voice when pronouncing a syllables of a word ; hence, the unstressed part of the metrical foot of a verse upon which such a depression falls , or an unaccented musical note .

Derived terms

• all but thesis
• bachelor's thesis
• Church-Turing thesis
• conflict thesis
• doctoral thesis
• graduate thesis
• Habakkuk thesis
• master's thesis
• Merton thesis
• private language thesis
• thesis defense
• thesis film
• thesis statement

Related terms

Translations.

• ^ “ thē̆sis, n. ”, in MED Online , Ann Arbor, Mich.: University of Michigan , 2007 .
• ^ “ thesis, n. ”, in Lexico , Dictionary.com ; Oxford University Press , 2019–2022 .

Further reading

• “ thesis ”, in The Century Dictionary   [ … ] , New York, N.Y.: The Century Co. , 1911 , →OCLC .
• “ thesis ”, in Webster’s Revised Unabridged Dictionary , Springfield, Mass.: G. & C. Merriam , 1913 , →OCLC .
• Heists , Sethis , heists , shiest , shites , sithes , thises

From Latin thesis , from Ancient Greek θέσις ( thésis , “ a proposition, a statement, a thing laid down, thesis in rhetoric, thesis in prosody ” ) .

thesis   f ( plural theses or thesissen , diminutive thesisje   n )

• Dated form of these . Synonyms: dissertatie , proefschrift , scriptie

From Ancient Greek θέσις ( thésis , “ a proposition, a statement, a thing laid down, thesis in rhetoric, thesis in prosody ” ) .

• ( Classical Latin ) IPA ( key ) : /ˈtʰe.sis/ , [ˈt̪ʰɛs̠ɪs̠]
• ( modern Italianate Ecclesiastical ) IPA ( key ) : /ˈte.sis/ , [ˈt̪ɛːs̬is]

thesis   f ( genitive thesis ) ; third declension

Descendants

• → Dutch: thesis
• → Armenian: թեզ ( tʻez )
• → Dutch: these
• → Persian: تز ( tez )
• → Romanian: teză
• → Turkish: tez
• Galician: tese
• Italian: tesi
• English: thesis
• Portuguese: tese
• Spanish: tesis
• “ thesis ”, in Charlton T. Lewis and Charles Short ( 1879 ) A Latin Dictionary , Oxford: Clarendon Press
• thesis in Gaffiot, Félix ( 1934 ) Dictionnaire illustré latin-français , Hachette.

• English terms derived from Proto-Indo-European
• English terms derived from the Proto-Indo-European root *dʰeh₁-
• English terms inherited from Middle English
• English terms derived from Middle English
• English terms borrowed from Latin
• English terms derived from Latin
• English terms derived from Ancient Greek
• English doublets
• English 2-syllable words
• English terms with IPA pronunciation
• English terms with audio links
• Rhymes:English/iːsɪs
• Rhymes:English/iːsɪs/2 syllables
• Rhymes:English/iːsiːz
• Rhymes:English/iːsiːz/2 syllables
• English lemmas
• English nouns
• English countable nouns
• English nouns with irregular plurals
• en:Rhetoric
• English terms with quotations
• en:Mathematics
• en:Computer science
• en:Philosophy
• English contranyms
• Dutch terms derived from Latin
• Dutch terms derived from Ancient Greek
• Dutch terms with audio links
• Dutch lemmas
• Dutch nouns
• Dutch nouns with Latin plurals
• Dutch nouns with plural in -en
• Dutch feminine nouns
• Dutch dated forms
• Latin terms derived from Proto-Indo-European
• Latin terms derived from the Proto-Indo-European root *dʰeh₁-
• Latin terms borrowed from Ancient Greek
• Latin terms derived from Ancient Greek
• Latin 2-syllable words
• Latin terms with IPA pronunciation
• Latin lemmas
• Latin nouns
• Latin third declension nouns
• Latin feminine nouns in the third declension
• Latin feminine nouns
• Word of the day archive
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Definition of thesis

Did you know.

In high school, college, or graduate school, students often have to write a thesis on a topic in their major field of study. In many fields, a final thesis is the biggest challenge involved in getting a master's degree, and the same is true for students studying for a Ph.D. (a Ph.D. thesis is often called a dissertation ). But a thesis may also be an idea; so in the course of the paper the student may put forth several theses (notice the plural form) and attempt to prove them.

Examples of thesis in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thesis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

in sense 3, Middle English, lowering of the voice, from Late Latin & Greek; Late Latin, from Greek, downbeat, more important part of a foot, literally, act of laying down; in other senses, Latin, from Greek, literally, act of laying down, from tithenai to put, lay down — more at do

14th century, in the meaning defined at sense 3a(1)

Dictionary Entries Near thesis

the sins of the fathers are visited upon the children

thesis novel

Cite this Entry

“Thesis.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/thesis. Accessed 2 Aug. 2024.

Kids Definition

Kids definition of thesis, more from merriam-webster on thesis.

Nglish: Translation of thesis for Spanish Speakers

Britannica English: Translation of thesis for Arabic Speakers

Britannica.com: Encyclopedia article about thesis

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Look up a word, learn it forever.

Dissertation, /ˈdɪsərˌteɪʃən/, /dɪsəˈteɪʃən/.

Other forms: dissertations

A dissertation is a long piece of writing that uses research to bring to light an original idea. Don't go to grad school unless you're prepared to write, say, a 300-page dissertation on some topic.

In everyday speech, we sometimes accuse people of delivering dissertations when they overload us with dull information. If you're annoyed with a long memo from your office manager about keeping the kitchen clean, you could mutter to a coworker, “How’d you like that dissertation Felix posted about rinsing out our mugs?”

• noun a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree synonyms: thesis see more see less type of: tractate , treatise a formal exposition

Vocabulary lists containing dissertation

Find lists of SAT words organized by every letter of the alphabet here: A , B , C , D , E , F , G , H , I , J, K & L , M , N , O , P , Q , R , S , T , U , V , and W, X, Y & Z .

Set in Afghanistan during a time of political and social upheaval, this novel traces the decades-long friendship of two boys from different social classes.

A group of extraordinarily talented African-American women help NASA achieve some of its greatest successes, even as they face discrimination and oppression.

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What is the Difference Between a Dissertation and a Thesis?

Find your perfect postgrad program search our database of 30,000 courses.

And to make it even more confusing, some institutions or departments will even use the terms differently!

But what are we all really talking about when we refer to a dissertation or a thesis? And does the term you use actually impact on what you actually end up writing?

This article covers the main differences between a dissertation and thesis, and how the terms may differ depending on the course, university and location.

What is a dissertation?

A dissertation is a piece of academic writing centred around original research. In their dissertations, students review existing research but also build on this with unique hypotheses and approaches.

A dissertation can be used to disprove a previous theory or take existing theories and research in a new direction. It is a large research project that is usually completed at the end of the academic year.

Usually, a dissertation starts with a dissertation proposal , which is approved by a study supervisor. The student then completes the research and writes up the methodology , findings, evaluations and conclusions from the research.

Dissertations can be undertaken by both undergraduate and postgraduate students. At undergraduate level the word count is around 5,000 to 8,000 and at postgraduate level it is usually 10,000 to 15,000.

What is a thesis?

A thesis is an academic paper covering an in-depth review of existing research in a particular discipline. It will involve an academic argument, although it doesn’t usually require original research from the student. The existing research is used to support and evaluate the proposed argument.

A thesis is not usually required at undergraduate level and is more common at postgraduate level.

This large piece of written-up research is usually completed at the end of a masters degree. Some masters courses require a thesis to graduate.

Differences between a dissertation vs thesis

The main purpose of a writing a dissertation is to add new findings to the existing literature in that field with original research. Whereas theses tend to evaluate existing findings, as their purpose is to demonstrate knowledge and skills within the course’s subject matter.

In terms of how long it takes to complete a thesis or dissertation project, a thesis is typically shorter than a dissertation since there are fewer original research aspects involved. This means that it will probably take less time. However, this can differ depending on the university and the course.

Dissertations sometimes require an oral presentation, known as a viva , where findings are showcased to academics who ask questions about the research. Theses usually do not require this.

The root of the words 

The word ‘dissertation’ originates from the Latin word ‘dissertare’, meaning to continue to discuss and the Latin word ‘disserere’ which means to examine and discuss .

The word ‘thesis’ originally comes from the Greek word ‘tithenai’, which means to place or position. This later evolved into the Latin ‘thesis’, which had two meanings: an abstract question and to put something forward .

Similarities between a dissertation vs thesis

Although there are some key differences between a dissertation and a thesis, there are also similarities.

• Both are generally long pieces of academic writing, much longer than a typical essay.
• Both explore a topic in depth, whether you are conducting totally unique research or structuring an argument based on existing research.
• Both are considered a final project and usually required to graduate from a degree, masters or PhD. Students can graduate without a thesis or dissertation if they choose to complete a postgraduate diploma or postgraduate certificate instead.
• Excellent academic writing skills are highly important for both types of research project.

Is a dissertation harder than a thesis?

Though, the difficulty of a thesis or dissertation depends on your personal skill set. For instance, students that learn better by developing their own research ideas may find a dissertation easier than a thesis.

Difficulty can also depend on the level of the course. For instance, a thesis completed at doctorate level is likely to require more advanced knowledge than a thesis at undergraduate level.

The difficulty of either type of research project can also vary depending on the subject matter and the resources available to you.

Both dissertations and theses can be challenging, but don’t be put off by the thought of having to produce a larger body of work. Your supervisor will be there to support you.

Definitions depend on where you are

The terms ‘dissertation’ and ‘thesis’ are sometimes used interchangeably, and the meanings can differ depending on the country and university.

There are plenty of differences between the variant forms of English, such as British English and American English. Around the world, different English-speaking countries use the words ‘dissertation’ and ‘thesis’ differently. 

Generally, nations with British-based academic systems of university education use dissertation to refer to the body of work at the end of an undergraduate or masters level degree . British-based institutions generally use thesis to refer to the body of work produced at the end of a PhD . 

In countries and institutions that are based on the American system of education, the words tend to be used in reverse. However, institutions and even different departments in the same university can use the words differently. 

If you're in doubt, then stick with the way the university and department you're currently attending use the terms. 

Definitions can depend on the subject

In the UK, the terms ‘dissertation’ and ‘thesis’ are generally applied equally across institutions and subjects. 

However, in the US the meanings can differ between different subject areas. The term ‘thesis’ can be used to describe a piece of original research in US academia, whereas original research is usually referred to as a dissertation in the UK. 

If you’re studying in the US , you may complete a thesis at masters level in another subject area that involves wide-ranging reading and understanding rather than original research and still call it a thesis.

With so much interchangeability between the two terms, it’s understandable that there is often confusion in the debate between a dissertation vs thesis, as there is no clear answer. 

Always read specific course details to understand exactly what’s involved in the research project that you are required to produce.

Examples from US and UK universities

Georgetown University in the US refers to a dissertation and a thesis as both adding to your 'field of knowledge' . The University of Edinburgh recommends that you refer to your individual course handbook for guides to dissertations, so each department will have their own guidelines to using the word dissertation and thesis. At University College London they refer to a thesis as the piece of work at the end of an EngD, MPhil, MD(Res) or PhD, which are all research degrees. 

In conclusion

Ultimately, it doesn't really matter which word you use as both refer to a serious and lengthy piece of work where you can show what you have researched and understood as part of your postgraduate studies.

As long as you are referring to the piece of work that you are compiling in the same way as those in your department then you will avoid confusion.

It is important to check whether the research piece involves original research or expects you to build upon existing research.

Writing a dissertation or a thesis requires a substantial amount of planning and work and you don't want to let yourself down at the last hurdle with poor presentation of your work, so always keep an eye on your course or department guidelines.

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thesis noun

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What does the noun thesis mean?

There are seven meanings listed in OED's entry for the noun thesis . See ‘Meaning & use’ for definitions, usage, and quotation evidence.

thesis has developed meanings and uses in subjects including

Entry status

OED is undergoing a continuous programme of revision to modernize and improve definitions. This entry has not yet been fully revised.

How common is the noun thesis ?

How is the noun thesis pronounced?

British english, u.s. english, where does the noun thesis come from.

Earliest known use

Middle English

The earliest known use of the noun thesis is in the Middle English period (1150—1500).

OED's earliest evidence for thesis is from before 1398, in a translation by John Trevisa, translator.

thesis is a borrowing from Greek.

Etymons: Greek θέσις .

Nearby entries

• thesaurus, n. 1823–
• thesaury, n. a1639–1708
• these, n. a1600–48
• these, pron. & adj. Old English–
• Thesean, adj. 1815–
• Theseid, n. 1725–
• Theseium, n. 1819–
• these-like, adj. 1644–
• thesial, adj. 1654
• thesicle, n. 1863–
• thesis, n. a1398–
• thesis-novel, n. 1934–
• thesis-play, n. 1902–
• thesmophilist, n. 1644–
• Thesmophorian, adj. 1891–
• Thesmophoric, adj. 1788–
• thesmothete, n. 1603–
• thesocyte, n. 1887–
• thesp, n. 1962–
• Thespian, adj. & n. 1675–
• Thespianism, n. 1914–

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Meaning & use

Pronunciation, compounds & derived words, entry history for thesis, n..

thesis, n. was first published in 1912; not yet revised.

thesis, n. was last modified in December 2023.

Revision of the OED is a long-term project. Entries in oed.com which have not been revised may include:

• corrections and revisions to definitions, pronunciation, etymology, headwords, variant spellings, quotations, and dates;
• new senses, phrases, and quotations which have been added in subsequent print and online updates.

Revisions and additions of this kind were last incorporated into thesis, n. in December 2023.

Earlier versions of this entry were published in:

OED First Edition (1912)

• Find out more

OED Second Edition (1989)

• View thesis in OED Second Edition

Please submit your feedback for thesis, n.

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Citation details

Factsheet for thesis, n., browse entry.

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• Introduction

What is a dissertation? How is it different from an essay?

• Getting it down on paper
• Drafting and rewriting
• Planning your dissertation
• Planning for length
• Planning for content
• Abstracts, tone, unity of style
• General comments

There are some obvious differences: an essay is relatively short – usually 1500 to 2500 words – and you are told clearly what to do by someone else. For example: Describe and evaluate major theories of globalisation.

A dissertation is a subject you chose for yourself. The first usage of the word in the English language in 1651 also gives a useful starting definition: “an extended written treatment of a subject”.

Another useful clue is found in the Latin origin of the word – dissertation comes from a Latin word ‘dissertare’ = ‘to debate’.

What does the word ‘debate’ imply? A discussion involving different points of view or sets of ideas. A dissertation will therefore not only examine a subject but will review different points of view about that subject.

Here’s another definition that underlines some more important characteristics of a dissertation: “a substantial paper that is typically based on original research and that gives evidence of the candidate’s mastery both of her own subject and of scholarly method.”

A dissertation will show that the writer knows her subject, the key facts and different points of view in it – but it also advances a point of view resulting from original research. Remember that ‘original’ does not mean ‘something that’s never been done before’ but rather ‘something that you do for yourself’.

A dissertation also “gives evidence of the candidate’s mastery […] of scholarly method”. This sounds terribly daunting but don’t be put off. The phrase is telling you that you will have to lift your game to write a successful dissertation. ‘Scholarly method’ means that you will be expected to do more and better reading and research than for a standard undergraduate essay. It means that your work will display accuracy and skill in its investigation and discussion of a subject. It means that your discussion will give evidence of critical analysis i.e. standing back from your subject and weighing up pros and cons. It means you will show that you understand that, for example, aspects of particular theories or viewpoints are open to question.

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[ thee -sis ]

He vigorously defended his thesis on the causes of war.

Synonyms: proposal , contention , theory

• a subject for a composition or essay.
• a dissertation on a particular subject in which one has done original research, as one presented by a candidate for a diploma or degree.
• Music. the downward stroke in conducting; downbeat. Compare arsis ( def 1 ) .
• a part of a metrical foot that does not bear the ictus or stress.
• (less commonly) the part of a metrical foot that bears the ictus. Compare arsis ( def 2 ) .
• Philosophy. Hegelian dialectic

/ ˈθiːsɪs /

• a dissertation resulting from original research, esp when submitted by a candidate for a degree or diploma
• a doctrine maintained or promoted in argument
• a subject for a discussion or essay
• an unproved statement, esp one put forward as a premise in an argument
• music the downbeat of a bar, as indicated in conducting
• (in classical prosody) the syllable or part of a metrical foot not receiving the ictus Compare arsis
• philosophy the first stage in the Hegelian dialectic, that is challenged by the antithesis
• The central idea in a piece of writing, sometimes contained in a topic sentence .

Word History and Origins

Origin of thesis 1

Example Sentences

“The Saudis have been proving the thesis of the film — they do in fact have an army,” said Thor Halvorssen, founder and chief executive of the nonprofit Human Rights Foundation, which funded the movie.

It’s a hypothesis that Bush pursued in her master’s thesis, and last year she began attending virtual Goth parties in a final round of field work before defending her doctoral thesis later this year.

While this partnership was planned prior to the coronavirus outbreak, co-founder Jordana Kier said the pandemic instantly proved out the expansion thesis.

They’ve had to defend that thesis for a very, very long time in front of a variety of different customers and different people.

Over the past decade, In-Q-Tel has been one of the most active investors in the commercial space sector, with a broad investment thesis that touches many aspects of the sector.

In “Back Home,” Gil also revisits the nostalgia for the South explored in his Johns Hopkins thesis, “Circle of Stone.”

At least father and son were in alignment on this central thesis: acting “gay”—bad; being thought of as gay—bad.

Her doctoral thesis, says Ramin Takloo at the University of Illinois, was simply outstanding.

Marshall McLuhan long ago argued the now accepted thesis that different mediums have different influences on thinking.

He wrote his Master's thesis on the underrepresentation of young people in Congress.

And indeed for most young men a college thesis is but an exercise for sharpening the wits, rarely dangerous in its later effects.

It will be for the reader to determine whether the main thesis of the book has gained or lost by the new evidence.

But the word thesis, when applied to Systems, does not mean the 'position' of single notes, but of groups of notes.

This conclusion, it need hardly be said, is in entire agreement with the main thesis of the preceding pages.

Sundry outlying Indians, with ammunition to waste, took belly and knee rests and strengthened the thesis to the contrary.

Related Words

• proposition
• supposition

What Is The Plural Of Thesis?

Plural word for  thesis.

The plural form of thesis is theses , pronounced [ thee -seez ]. The plurals of several other singular words that end in -is are also formed in this way, including hypothesis / hypotheses , crisis / crises , and axis / axes . A similar change is made when pluralizing appendix as appendices . 

Irregular plurals that are formed like theses derive directly from their original pluralization in Latin and Greek.

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Meaning of dissertation – Learner’s Dictionary

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(Definition of dissertation from the Cambridge Learner's Dictionary © Cambridge University Press)

Translations of dissertation

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Definition of thesis noun from the Oxford Advanced Learner's Dictionary

• Students must submit a thesis on an agreed subject within four years.
• He presented this thesis for his PhD.
• a thesis for a master's degree
• He's doing a doctoral thesis on the early works of Shostakovich.
• Many departments require their students to do a thesis defense.
• She completed an MSc by thesis.
• her thesis adviser at MIT
• in a/​the thesis
• thesis about

Questions about grammar and vocabulary?

Find the answers with Practical English Usage online, your indispensable guide to problems in English.

• The basic thesis of the book is fairly simple.
• These latest findings support the thesis that sexuality is determined by nature rather than choice.
• formulate/​advance a theory/​hypothesis
• build/​construct/​create/​develop a simple/​theoretical/​mathematical model
• develop/​establish/​provide/​use a theoretical/​conceptual framework
• advance/​argue/​develop the thesis that…
• explore an idea/​a concept/​a hypothesis
• make a prediction/​an inference
• base a prediction/​your calculations on something
• investigate/​evaluate/​accept/​challenge/​reject a theory/​hypothesis/​model
• design an experiment/​a questionnaire/​a study/​a test
• do research/​an experiment/​an analysis
• make observations/​measurements/​calculations
• carry out/​conduct/​perform an experiment/​a test/​a longitudinal study/​observations/​clinical trials
• run an experiment/​a simulation/​clinical trials
• repeat an experiment/​a test/​an analysis
• replicate a study/​the results/​the findings
• observe/​study/​examine/​investigate/​assess a pattern/​a process/​a behaviour
• fund/​support the research/​project/​study
• seek/​provide/​get/​secure funding for research
• collect/​gather/​extract data/​information
• yield data/​evidence/​similar findings/​the same results
• analyse/​examine the data/​soil samples/​a specimen
• consider/​compare/​interpret the results/​findings
• fit the data/​model
• confirm/​support/​verify a prediction/​a hypothesis/​the results/​the findings
• prove a conjecture/​hypothesis/​theorem
• draw/​make/​reach the same conclusions
• read/​review the records/​literature
• describe/​report an experiment/​a study
• present/​publish/​summarize the results/​findings
• present/​publish/​read/​review/​cite a paper in a scientific journal
• The results of the experiment support his central thesis.
• Most people rejected this thesis at the time because it presumed evolution rather than creation.
• fundamental

Nearby words

Glossary in Dissertation

Discover how to create an effective glossary in your dissertation. Learn tips & examples to help you define key terms clearly and concisely.

Creating a glossary in a dissertation is an essential step to ensure clarity and comprehensibility for readers who may not be familiar with specialized terminology. Glossary entries and definitions are considered part of shared common knowledge and may not necessarily have to be cited, but it is still important to cite sources to avoid accidental plagiarism. A well-crafted glossary provides concise definitions of key terms and concepts, aiding in the reader’s understanding and enhancing the overall coherence of the document. In this guide, we will delve into the importance of including a glossary in a dissertation, how to structure it effectively, and best practices for curating entries that are both informative and accessible. Let’s explore how to make your dissertation more reader-friendly with a comprehensive glossary.

Importance of a Glossary

Clarifying technical terms.

A glossary in a dissertation plays a pivotal role in clarifying key terms that may be unfamiliar to the reader. Academic writing often involves the usage of specialized language and jargon that can be daunting for those not well-versed in the subject matter. Citing the definition in-text can provide a more explicit elaboration of a given point within the document. By providing clear and concise definitions, a glossary ensures that readers can grasp the nuances of your discussion without confusion. This not only aids in better comprehension but also makes your research more accessible to a broader audience. Moreover, it demonstrates your meticulousness and attention to detail, reinforcing the credibility of your work. Including a glossary is particularly important in interdisciplinary research, where terms may have different meanings across fields. Thus, a well-structured glossary is essential in enhancing the readability and overall coherence of your dissertation.

Enhancing Readability

A glossary in a dissertation significantly enhances the readability of your document. A glossary list plays a crucial role in providing explanations and meanings of technical terms used in the paper. When readers encounter unfamiliar terms, they can quickly refer to the glossary for precise definitions, avoiding the need to search for explanations elsewhere. This uninterrupted flow of reading helps maintain their focus and engagement with your content. Additionally, a glossary can prevent misinterpretations by providing authoritative definitions of complex terms. By offering these clarifications, you ensure that your arguments and findings are accurately understood, thereby strengthening your overall narrative. Moreover, a glossary serves as a valuable reference tool, particularly in lengthy dissertations, where readers might forget the meanings of earlier introduced terms. In essence, a well-crafted glossary enhances the user experience by making your dissertation more approachable and easier to navigate, thereby broadening its appeal and impact.

Supporting Non-Experts

A glossary in a dissertation is especially beneficial for non-experts who may not be familiar with the specialized terminology of your field. Academic dissertations often attract a diverse readership, including peers from other disciplines, policymakers, and even the general public. If the dissertation does not contain a lot of technical terms, the glossary can be replaced by footnotes to provide explanations and meanings of the few terms used. Providing a glossary ensures that these readers can fully engage with your work without being hindered by unfamiliar terms. By translating complex jargon into accessible language, you make your research more inclusive and widely understood. This not only broadens the impact of your findings but also fosters interdisciplinary dialogue. Moreover, supporting non-experts through a glossary demonstrates a commitment to clear and effective communication, which is a hallmark of good scholarship. In summary, a well-curated glossary makes your dissertation approachable to a wider audience, enhancing its relevance and reach.

Creating Your Glossary

Selecting relevant terms.

When creating a glossary in your dissertation, selecting relevant terms is a crucial step. Begin by identifying the specialized terminology and jargon that are central to your research. An in-depth exploration or analysis of specific components or aspects of your dissertation can help in selecting the most relevant terms for the glossary. These could be technical terms, acronyms, or concepts that are specific to your field of study. It is important to consider the perspective of your readers—both experts and non-experts—when deciding which terms to include. Ask yourself whether a term is likely to be unfamiliar or ambiguous to someone outside your immediate research community. Additionally, review your dissertation to spot any terms that recur frequently and are integral to understanding your arguments. By focusing on the most pertinent terms, you ensure that your glossary is both comprehensive and useful. Keep in mind that the goal is to enhance clarity and accessibility, so avoid including overly basic terms that your audience is likely to know.

Defining with Precision

Defining terms with precision is a key aspect of creating an effective glossary in your dissertation. Adding page numbers to the terms in a glossary allows readers to easily find where the terms are used in the text. Each definition should be clear, concise, and accurate, providing the reader with a quick yet thorough understanding of the term. Avoid using overly complex language or technical jargon within the definitions themselves. Instead, aim for simplicity and clarity, ensuring that even readers with limited background knowledge can grasp the meaning. It is also important to be consistent in your definitions. If a term has multiple meanings, specify which one is being used in the context of your research. Additionally, providing examples or context can further clarify the term’s application and relevance. Remember, the purpose of a glossary is to aid comprehension and enhance the reader’s experience. Therefore, precision in your definitions is paramount, as it eliminates ambiguity and ensures that your findings and arguments are correctly interpreted.

Organizing in Alphabetical Order

Organizing your glossary alphabetically is the most straightforward and user-friendly method. An alphabetical arrangement allows readers to quickly locate specific terms without having to sift through the entire list. Additionally, organizing abbreviations in a glossary as a separate list from the main definitions makes it easier for the reader to navigate and understand the content. This structure mirrors that of dictionaries, making it intuitive for users who are accustomed to this format. Begin by listing all the terms you plan to include and then sort them alphabetically. Ensure that each entry is clearly distinguished, possibly using bold or italics for the terms themselves. Consistency in formatting is key to maintaining a clean and professional appearance. Additionally, if you have a large number of terms, consider breaking them into sections based on the initial letter for easier navigation. An alphabetically organized glossary not only enhances usability but also reflects a methodical and organized approach, further reinforcing the credibility and thoroughness of your dissertation.

Placement in Dissertation Paper

Introduction section.

Placing your glossary in the introduction section of your dissertation can be highly effective. By situating it early in your document, you provide readers with the necessary tools to understand specialized terms right from the start. This preemptive approach ensures that readers are not confused by unfamiliar terminology as they delve into your research. It also sets the stage for a smoother reading experience, allowing them to focus on the content without frequent interruptions to seek definitions. Including the glossary in the introduction serves as a helpful guide, particularly for non-experts or those new to your field. Additionally, it demonstrates your consideration for the reader’s experience, showcasing your commitment to clear and accessible communication. Overall, positioning the glossary in the introduction is a strategic choice that enhances the readability and comprehensibility of your dissertation.

Including your glossary in the appendices is another common and effective placement option in a dissertation. This approach keeps the main text of your dissertation uncluttered, allowing readers to focus on your core arguments and findings without frequent breaks to consult definitions. By placing the glossary in the appendices, you provide a comprehensive reference section that readers can easily access as needed. This is particularly useful for lengthy dissertations with extensive specialized terminology. It also allows for a more detailed and expansive glossary, as space constraints are less of an issue in the appendices. However, it is important to clearly indicate the existence and location of the glossary early in your dissertation, such as in the table of contents or through a brief mention in the introduction. This ensures that readers are aware of this valuable resource and can utilize it effectively throughout their reading.

Footnotes and Endnotes

Using footnotes and endnotes for glossary terms is a flexible option for dissertations. This method allows you to provide definitions directly where the terms appear, offering immediate clarification without requiring the reader to navigate to a separate section. Footnotes are typically placed at the bottom of the page, making them easily accessible, while endnotes are compiled at the end of each chapter or the entire document. Both methods ensure that readers have instant access to definitions, enhancing the flow and comprehension of your text. However, this approach can become cumbersome if your dissertation contains a large number of specialized terms, potentially cluttering the pages with excessive notes. Therefore, it is best suited for dissertations with fewer glossary entries. Regardless of the method, the key is to maintain consistency and ensure that all terms are clearly and accurately defined, supporting the reader’s understanding of your work.

Best Practices

Consistency in definitions.

Maintaining consistency in your definitions is crucial for an effective glossary in your dissertation. Consistency ensures that each term is clearly understood in the same way throughout the document, preventing confusion and misinterpretation. When defining terms, use a standard format and structure to provide a uniform reading experience. For example, always include the term, followed by a concise definition and, if necessary, an example or context. Avoid using different definitions for the same term in various parts of your dissertation, as this can lead to ambiguity. Additionally, if you refer to external sources for definitions, ensure that these sources are credible and cited consistently. Consistent definitions not only enhance the readability of your dissertation but also reflect your attention to detail and scholarly rigor. In summary, a uniform and systematic approach to defining terms strengthens the clarity and coherence of your glossary, making your dissertation more accessible and understandable.

Avoiding Jargon

Avoiding jargon in your glossary is essential to ensure that it serves its intended purpose—clarifying terms for all readers. While your dissertation may require the use of specialized language, the glossary should translate this jargon into clear, straightforward definitions. Using jargon within definitions defeats the purpose of a glossary and can alienate readers who are not experts in your field. Aim for simplicity and clarity, employing plain language that can be easily understood by a broad audience. If a term is unavoidably complex, consider breaking down its definition into more digestible parts or providing a brief example to illustrate its meaning. Remember, the goal is to make your dissertation accessible and comprehensible to as many readers as possible. By avoiding jargon in your glossary, you enhance the overall readability of your document and ensure that your research can be appreciated and understood by a wider audience.

Keeping it Concise

Keeping your glossary entries concise is a best practice that enhances the usability and effectiveness of your dissertation. While it is important to provide clear and accurate definitions, overly lengthy explanations can overwhelm readers and defeat the purpose of a glossary. Aim to distill each term down to its essential meaning, using as few words as possible without sacrificing clarity. Concise definitions are easier for readers to quickly comprehend, allowing them to maintain their focus on the main content of your dissertation. If a term requires a more detailed explanation, consider providing a brief summary in the glossary and directing readers to a specific section of your dissertation for further information. This approach ensures that your glossary remains a handy reference tool rather than becoming another lengthy section of text. In summary, concise entries in your glossary contribute to a more efficient and reader-friendly dissertation.

Common Mistakes

Overloading with terms.

One common mistake when creating a glossary in a dissertation is overloading it with too many terms. While it is important to provide definitions for specialized terminology, including every possible term can overwhelm readers and dilute the effectiveness of the glossary. Focus on terms that are essential for understanding your research and are likely to be unfamiliar to your audience. Including overly basic or tangentially related terms can clutter the glossary and make it harder for readers to find the information they truly need. Additionally, an excessively lengthy glossary can give the impression of a lack of focus or an attempt to pad the document. Aim for a balance between comprehensiveness and relevance, ensuring that each term included serves a clear purpose in aiding comprehension. By avoiding the overload of terms, you can create a more streamlined and useful glossary that enhances the readability and coherence of your dissertation.

Vague Definitions

Vague definitions are a common pitfall when creating a glossary for your dissertation. Definitions that lack specificity can lead to confusion and misinterpretation, defeating the purpose of the glossary. It is important to provide clear, precise, and unambiguous explanations for each term. Avoid using imprecise language or circular definitions that do not add clarity. Instead, aim to offer concrete and easily understandable explanations that leave no room for doubt. If a term is complex, break it down into simpler components and provide context or examples to aid understanding. Remember, the glossary should serve as a reliable reference for readers, ensuring they can accurately grasp the terminology used in your research. By avoiding vague definitions, you enhance the clarity and effectiveness of your glossary, thereby improving the overall readability and comprehensibility of your dissertation.

Inconsistent Formatting

Inconsistent formatting is a common mistake that can undermine the effectiveness of your glossary in a dissertation. Uniform formatting ensures that your glossary appears professional and is easy to navigate. Discrepancies in font size, style, or layout can distract readers and make it difficult to find and understand terms. To maintain consistency, establish a clear format for your entries from the outset. For example, you might choose to bold the terms and use regular text for the definitions. Additionally, decide on a uniform structure for definitions, such as starting with a brief explanation followed by an example if needed. Consistent formatting also extends to the organization of the glossary, such as maintaining alphabetical order and using the same punctuation style throughout. By adhering to a consistent format, you enhance the readability and professionalism of your glossary, making it a more effective tool for aiding comprehension in your dissertation.

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