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:
I suggested he sounded like a conspiracy theorist, implying the whole world was out to get him.
From BBC ● Sep. 3, 2026
They include four US House hopefuls and six candidates for governor, among them conspiracy theorist Mike Lindell in Minnesota.
From Barron's ● Aug. 30, 2026
The influencer said when people find out that she listens to Owens, they often mock her and call her a conspiracy theorist.
From Salon ● Aug. 26, 2026
After an initial experiment with inconclusive results, he asked me, as a quantum theorist, for help in working out what to expect.
From Science Daily ● Aug. 4, 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
The use of Q phrases by government agencies during wartime has excited online conspiracy theorists.
From Salon ● Aug. 28, 2026
And his idea is this: Have tech companies use A.I. to spur interactions among conspiracy theorists, pro-science activists, and the middle-ground groups, such as the parenting communities.
From Slate ● Aug. 26, 2026
Meanwhile, theorists such as Russian cosmologist Alexander Friedmann took Einstein's equations more literally and developed the theoretical foundation that would help support the Big Bang theory.
From Science Daily ● Aug. 18, 2026
For nearly three decades, a onetime Compton gang leader named Duane “Keffe D” Davis has been one of the most vocal theorists about one of the most debated celebrity killings ever.
From Los Angeles Times ● Aug. 12, 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.
