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Definitions

theorist

[thee-er-ist, theer-] / ˈθi ər ɪst, ˈθɪər- /
NOUN
philosopher
Synonyms




Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s the classic mindset of the conspiracy theorist: The absence of proof of the conspiracy is simply proof of how deep the conspiracy goes!

From MarketWatch • Apr. 3, 2026

Local media described Freeman as a conspiracy theorist and member of the so-called "sovereign citizen" movement, which falsely believes it is not subject to the law.

From Barron's • Mar. 30, 2026

Among the names read out was Prof Peter Higgs, the British theorist who, nearly half a century earlier, had predicted the existence of a particle believed to hold the cosmos together – the Higgs boson.

From BBC • Mar. 17, 2026

Take Roger Schank, an AI researcher and theorist who died in 2023.

From Salon • Feb. 24, 2026

Their approaches to physics were divergent: Lawrence was an experimentalist nonpareil, Teller a profoundly intuitive theorist.

From "Big Science" by Michael Hiltzik