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
Florida's B.E.S.T. Common Suffixes: -ist
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Selection Vocabulary 3, Unit 1
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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.
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
“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
In the 1980s, Pakistan welcomed the Palestinian theorist of jihad Abdullah Azzam.
From The Wall Street Journal • Apr. 22, 2026
US satirical publication The Onion has proposed a new plan to take over Infowars, the media company run by right-wing conspiracy theorist Alex Jones.
From BBC • Apr. 21, 2026
Somewhere between Bragg the theorist and Perutz the experimentalist was Francis, who occasionally did experiments but more often was immersed in the theories for solving protein structures.
From "Double Helix" by James D. Watson
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.
