noun
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
Selection Vocabulary 3, Unit 1
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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.
Do you ever get the sense that your Twitter algorithm thinks that you, yourself, are a conspiracy theorist?
From Slate • May 7, 2026
“CNN seeks to be a stethoscope attached to the hypothetical heart of the war, and to present us with its hypothetical pulse,” the French theorist Jean Baudrillard wrote, critiquing the conflict as a media spectacle.
From Los Angeles Times • May 6, 2026
For those who crave it, being an online conspiracy theorist is a reliable source of attention and praise, especially if they aren’t especially picky about who it’s coming from.
From Salon • Apr. 24, 2026
In December 2022, West also appeared on a podcast hosted by conspiracy theorist Alex Jones.
From BBC • Apr. 7, 2026
In Germany, however, Taylor’s idea was picked up, and effectively appropriated, by a theorist named Alfred Wegener, a meteorologist at the University of Marburg.
From "A Short History of Nearly Everything" by Bill Bryson
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.
