thesis meaning collins dictionary

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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
• See arsis (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 .

Discover More

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.

[ ak -s uh -lot-l ]

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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

English [ edit ]

Etymology [ edit ].

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 [ edit ]

• ( 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

Noun [ edit ]

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 [ edit ]

• 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 [ edit ]

Translations [ edit ], references [ edit ].

• ^ “ 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 [ edit ]

• “ 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 .

Anagrams [ edit ]

• Heists , Sethis , heists , shiest , shites , sithes , thises

Dutch [ edit ]

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

Latin [ edit ]

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

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

thesis   f ( genitive thesis ) ; third declension

Declension [ edit ]

Descendants [ edit ].

• → Dutch: thesis
• → Armenian: թեզ ( t‘ez )
• → 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
• 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
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• Latin terms derived from the Proto-Indo-European root *dʰeh₁-
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• Latin terms with IPA pronunciation
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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 21 Apr. 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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What’s the Difference between a Dissertation and a Thesis

• By Dr Harry Hothi
• August 18, 2020

Confusingly, the terms dissertation and thesis are often used interchangeably within higher education and university environments (or graduate school in the USA). Depending on the context, someone may refer to a project write up as a thesis while another person may call the same document a dissertation. In another scenario, both terms may refer to very specific and different things. If we take a look at the meaning of dissertation’ and thesis’ in the Cambridge English Dictionary, we find their definitions to be:

The dictionary definitions of these two words are almost identical! Technically and historically this has been the correct however if we look at the definition of ‘dissertation’ and ‘thesis’ in the Collins English Dictionary, we start to get a sense of the modern interpretation of the two words, particularly as they’re used in the United Kingdom:

Dissertation vs Thesis – the UK

The definition above succinctly sums up the differences between the terms dissertation and thesis in the UK and much of Europe. Most often students will be asked to write an undergraduate or Master’s dissertation whilst if you continue on to in to a PhD doctoral program, you’ll be writing up a thesis.

The distinction here is that a PhD (also referred to as a doctoral degree) requires the development of a novel body of work that adds new knowledge based purely on original research, whilst an undergraduate or Master’s project follows a period of taught modules and does not require novel research; for example it could consist solely of a review of existing research literature.

A well written dissertation project as part of a Masters degree would be closer in length and formatting to a research paper.

Imperial College London is a good example of an institution where this distinction between the terms is clear; the terminology used for students undertaking original research degrees is that they will be asked to submit a PhD, MPhil, MD(Res) or EngD thesis. Conversely, students enrolled in a taught Masters postgraduate degree are asked to submit Master’s dissertations.

As part of a doctoral degree, it’s also common to write research papers which go through a peer review process and help make your thesis defence that much easier. Publishing papers during a Masters degree is less common (but not impossible) than with a doctorate degree, simply because the emphasis with these is less on performing original research/contributing new knowledge, but more on equipping a student with the ability to do so in the future (i.e if they do eventually pursue a PhD degree).

An important structural difference between the two is that the Masters dissertation structure is usually centred around one primary research question whereas a Ph.D. is likely to contain each chapter to a separate research topic and research methodology.

A Masters degree can be a good way to develop basic research skills such as how to critically review existing literature and previously published papers. You’ll get a sense of what independent research is like and how to formulate a research plan. You’ll be required to submit coursework or another written report format on a given topic throughout the year, in addition to the final 10,000-20,000 word dissertation.

The difference here is that whilst you may perform your subject research, data collection and writing across several months for a Masters project, your PhD thesis work will take much longer. Your data collection alone for doctoral study can take in excess if two years and ideally you should be working towards your thesis writing over much of the three years of your project.

Finding a PhD has never been this easy – search for a PhD by keyword, location or academic area of interest.

Dissertation vs Thesis – the USA

Whilst this naming convention in the UK and the rest of Europe is used consistently across the vast majority of universities and departments, this is not necessarily the case at graduate schools in the United States of America.

The key thing to be aware of is that in the USA, the definitions are essentially reversed; a Masters degree in the United States is earned following the completion and submission of a Master thesis, whilst a doctoral dissertation is written by a graduate student as part of the journey towards a PhD degree.

Dissertation vs Thesis – the Similarities

Regardless of the precise term used to describe the body of academic work you produce, both of these will be substantial written documents. They will range in length from around 20,000 word dissertation for a Masters degree project write up, to over 50,000 words for a PhD submission; a 100,000 word thesis is usually the maximum permitted by most universities.

Click here to view PhD thesis examples that have been made available online by the University of Warwick

Some element of research work and independent learning will be key to both, however of course for PhDs, the research element will be the core focus that the work is centred on whilst the Maser’s (or undergraduate) project will have flexibility as to the extent of research work conducted.

Both a thesis and dissertation will conclude with the student taking part in a viva to defend the work of their research project. A dissertation defence for a masters degree will involve at least one faculty member and the student. A doctoral candidate will on the other hand have their thesis defense with at least one external examiner.

The confusion for students between the precise meaning of the term thesis and dissertation is completely understandable; this is due to the very similar dictionary definitions of the words combined with the different context they can refer to depending on what part of the world you’re in. Both require a substantial amount of academic writing, forming part of a graduate program to earn the academic degree of a PhD or Masters.

As I’m in the UK, I’ll conclude by saying that a dissertation is typically associated with the work of an undergraduate or Master’s degree, whilst a thesis is written as part of a research project leading to the award of a PhD degree or an equivalent research degree.

See below for a recap of answers to common questions about the differences between the a dissertation and thesis.

Can you convert a dissertation or thesis into a research paper?

Theoretically you should be able to write up the work presented in either document as a research paper or even several papers. You stand a better chance of making it through peer review if your research work contributes new knowledge to the subject matter. This is certainly possible at the Masters level and essential for a doctorate program. An undergraduate dissertation is less likely to lead to an academic paper unless this is something that has specifically been planned for before starting the project.

What degree program would you write a dissertation or thesis for?

Both documents are written at the graduate level. In the UK, a dissertation is written at the Masters levels whilst a doctorate dissertation is written to earn a Ph.D.

Do you have a viva after submitting a dissertation or thesis?

You will be required to defend your scholarly work in a viva format as part of your postgraduate studies.

As a masters student you will be required to take part in a dissertation defense; the general idea of this is to ensure you’ve understood your chosen topic and have learnt the skills to perform extensive research on a subject. These usually involve giving a 5 to 10 minute presentation, followed by a round of questions and answers with an internal examiner lasting up to 30 minutes (the exact process may vary depending on the educational institution).

A thesis defense or viva however requires a PhD student to present substantial information and supporting evidence to demonstrate how their research has built on previous work to contribute new information to the subject. For this reason, a viva to earn a doctorate degree can often last several hours.

Do you have to perform a literature review as part of a dissertation or thesis?

Yes you do. The main difference is that a literature review for a master’s thesis may be 1,000 to 2,000 words in length whilst for a doctoral thesis, it will be a standalone chapter of around 10,000 words.

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Dr Morrow gained his MD-PhD in Neuroscience from the University of Michigan. He now splits his time between providing clinical care to patients through the University of Michigan and research relevant to addiction and several other psychiatric disorders.

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Definition of thesis noun from the Oxford Advanced American Dictionary

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Synonyms and antonyms of thesis in English

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have irons in the fire

to be involved with many activities or jobs at the same time or to make certain that there are always several possibilities available

Binding, nailing, and gluing: talking about fastening things together

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