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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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.
See Examples For:
"We want to be a place where there's a mixing of lots of perspectives, and this is us practicing what we preach -- a cosmologist working closely with a condensed matter theorist."
From Science Daily ● Jun. 19, 2026
As a teenager growing up in Millerstown, Pa., Longwell was an avid reader of economist and conservative social theorist Thomas Sowell.
From The Wall Street Journal ● Jun. 13, 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
And he took an interest in Jones, the conspiracy theorist and radio and internet host.
From Los Angeles Times ● May 21, 2026
From his own experiences in Vietnam and his reading of the German military theorist Carl von Clausewitz, Van Riper became convinced that war was inherently unpredictable and messy and nonlinear.
From "Blink" by Malcolm Gladwell
This outperformance, incidentally, is a bit awkward for all those theorists claiming that the so-called “size factor” — meaning the outperformance of smaller companies’ stocks — is dead.
From MarketWatch ● Jul. 14, 2026
The irony of the Daily Wire’s historical excursion is that Walsh has stumbled into an approximation of the very historical critique that critical race theorists have advanced for decades.
From Salon ● May 20, 2026
"The only way theorists have come up with to birth sub-solar neutron stars is during the collapse of a very rapidly spinning star," Metzger says.
From Science Daily ● Apr. 24, 2026
The church is the clearest example of what theorists of geopolitics call “soft power,” said Massimo Faggioli, a church historian and professor at Trinity College Dublin.
From The Wall Street Journal ● Apr. 23, 2026
Oppenheimer was rare among theorists in conceding value to the uncomplicated perception of nature, free of abstractions, that happened to be Lawrence’s approach.
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.
