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
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
Selection Vocabulary 3, Unit 1
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
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
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
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 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
But both sides have strongly denied this was a repeat of the 'Disgrace of Gijon' - even though conspiracy theorists argue the nature of the chaotic finish, which included two injury-time goals, felt scripted.
From BBC ● Jun. 28, 2026
One is the sheer complexity of the federal budget and its absurd lack of transparency; this is catnip for conspiracy theorists.
From MarketWatch ● Jun. 4, 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
Only one copy of his manuscript survives, and later Jesuit theorists rediscovered his work only because they needed ammunition to use against William Gilbert.
From "The Invention of Science" by David Wootton
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.
