Word.ws English Dictionary

Plural of thesis

irregular plural

The plural of thesis is theses.

Forms of thesis

Singularthesis /ˈθiːsɪs/
Pluraltheses /ˈθiːsiːz/
Countablecountable

Theses in a sentence

  • I submit these nine theses to Wikipedia’s community and to the world.2025 September 30, Larry Sanger, “Nine Theses on Wikipedia”, in larrysanger.org
  • Martin Luther posted his ninety five theses on the door of the Castle Church in Wittenburg.From the entry post
  • The secretary offered a typing and copying service for theses, with the option of binding as an add on.From the entry add on
  • It attempts to show that expressivism is superior to realism at explaining two key theses.2007 February 7, Jeff Wisdom, “Base property exemplification and mixed worlds: remarks on the Shafer-Landau/Mabrito exchange”, in…. From the entry expressivism
  • His approach to unity is based on the theses of a Swiss lawyer-macrohistorian, Johan Bachofen, a US anthropologist, Lewis M.2010 November 2, Cameroun Douala, “The Cultural Unity of Black Africa?”, in Real News Network. From the entry mama's baby, papa's maybe

Meaning of thesis

  1. noun A proposition or statement supported by arguments.
  2. noun A lengthy essay written to establish the validity of a thesis (sense 1.1), especially one submitted in order to complete the requirements for a non-doctoral degree in the US and a doctoral degree in the UK; a dissertation.
  3. noun A conjecture, especially one too vague to be formally stated or verified but useful as a working convention.

Full definition of thesis

Nouns ending in -is: plural -es

Questions about the plural of thesis

What is the plural of thesis?
The plural of thesis is theses.
Is thesis countable?
Thesis is a countable noun.

Source and license

Adapted from Wiktionary: thesis (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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