noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of theorist
Explanation
Someone who considers given facts and comes up with a possible explanation is called a theorist. Theorists observe various phenomena and use reasoning to come up with practical ideas that must be proven. Theorists come up with abstract ideas and then spend their lives trying to prove them. Perhaps the most famous theorist was Albert Einstein, whose theory of relativity is arguably the most famous ever presented. Still, an idea can always be disputed until proven, and theorists are often scoffed at. Einstein himself once said, "No one but a theorist believes his theory; everyone puts faith in a laboratory result but the experimenter himself."
Vocabulary lists containing theorist
Florida's B.E.S.T. Common Suffixes: -ist
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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.
See Examples For:
"What we see here is not a detail of one particular material, but a general physical principle," says Fakher Assaad from the University of Würzburg, lead theorist of the work.
From Science Daily ● Jul. 8, 2026
A U.S. naval officer, historian, and military theorist, Mahan argued that control of the seas was the key to empires from Rome to Britain.
From Barron's ● Jun. 5, 2026
At times, he gives off the air of a professor, donning blue blazers and short-sleeved button-down shirts as he quotes the political theorist Hannah Arendt.
From The Wall Street Journal ● May 19, 2026
But it seems to think I’m a conspiracy theorist who is also interested in whatever the media drama of the day is.
From Slate ● May 7, 2026
Cicero was both theorist and practitioner of rhetoric—lawyer, politician, and teacher.
From "Words Like Loaded Pistols" by Sam Leith
With roots dating to 19th century European theorists like Max Weber and Émile Durkheim, sociology coalesced professionally in America during the Progressive Era.
From The Wall Street Journal ● Jul. 25, 2026
I'm sorry to disappoint any conspiracy theorists, but I can promise you there aren't any clandestine meetings between Fifa's executive committee and the referees.
From BBC ● Jul. 19, 2026
He has a well-documented history of trafficking in conspiracy theories himself, which made his ambiguous invocation of federal involvement a kind of implicit validation to conspiracy theorists that there might be more to the story.
From Salon ● Jul. 13, 2026
One is the sheer complexity of the federal budget and its absurd lack of transparency; this is catnip for conspiracy theorists.
From MarketWatch ● Jun. 4, 2026
But he resolved to bring theorists and experimentalists into closer contact in the lab, the better to challenge or reinforce one another’s judgments.
From "Big Science" by Michael Hiltzik
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
