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:
They included conspiracy theorist Laura Loomer, conservative activist Scott Pressler, and Katie Miller, a podcaster married to White House advisor Stephen Miller.
From Barron's ● Nov. 3, 2026
Digging into the incident, Gibney says, would have meant “playing Elon’s game” — trying “to put the pieces together like a conspiracy theorist would do to make sense of the chaos.”
From Los Angeles Times ● Oct. 6, 2026
They have required reading and a special fondness for theorist Karl Kautsky.
From The Wall Street Journal ● Sep. 12, 2026
I suggested he sounded like a conspiracy theorist, implying the whole world was out to get him.
From BBC ● Sep. 3, 2026
He was kind of a classic old-guy conspiracy theorist.
From "Becoming" by Michelle Obama
What followed was a huge search and rescue mission, which cost Suffolk Police more than £2m, captivated the country and fuelled conspiracy theorists.
From BBC ● Sep. 24, 2026
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
What made their partnership extraordinary was that during this nascent period of nuclear physics, theorists and experimentalists customarily regarded each other with mutual condescension and suspicion.
From "Big Science" by Michael Hiltzik
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Get a wordDefinitions 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.
