Thesis
noun /ˈθiːsɪs/ — The central claim an argument builds toward proving — the point everything else serves.
Definition
A statement or theory that is put forward as a premise to be maintained or proved; a long essay or dissertation involving original research, submitted as part of a degree.
Beyond the definition
A thesis is intellectual commitment — the moment you stop exploring and say: this is what I believe, and I will defend it. It takes courage to have a thesis, because it means being wrong is possible and public.
Origin & history
From Greek thesis — placing, proposition (from tithenai: to place). What is placed — the claim you set down for examination. The Hegelian triad of thesis-antithesis-synthesis made it famous beyond academia.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
Her thesis in one sentence: that technology didn't replace human connection but revealed how much of it was already performance.
A thesis that can't be stated clearly probably hasn't been thought clearly — the writing is diagnostic.
He spent three years defending a thesis no one else had believed when he proposed it.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Thesis” when the meaning fits your context: A statement or theory that is put forward as a premise to be maintained or proved; a long essay or dissertation involving original research, submitted as part of a degree.
Synonyms
argument, claim, proposition, hypothesis, position, contention
Antonyms
concession, refutation
Related words
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Researcher with an ancient book
An adult stands in an archive, holding open a heavy, ancient book filled with handwritten records.
The book represents a body of research or a long-standing argument. It serves as a physical premise to be maintained, studied, or proved through original inquiry and scholarly analysis.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Thesis" mean?
Thesis is noun meaning: The central claim an argument builds toward proving — the point everything else serves.. A statement or theory that is put forward as a premise to be maintained or proved; a long essay or dissertation involving original research, submitted as part of a degree.
Where does the word "Thesis" come from?
From Greek thesis — placing, proposition (from tithenai: to place). What is placed — the claim you set down for examination. The Hegelian triad of thesis-antithesis-synthesis made it famous beyond academia.