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:
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
A conspiracy theorist subscribes with unshakable faith to an ideological worldview.
From The Wall Street Journal ● Aug. 13, 2026
"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
Born in 1871 to a handyman and his wife in New Zealand when it was a remote outpost of the British Empire, Rutherford became an intuitive theorist and the preeminent experimental physicist of his age.
From "Big Science" by Michael Hiltzik
Although the breadth of Ms. Rubel’s reading is impressive, readers might rather hear what the author has to say than a range of academic theorists.
From The Wall Street Journal ● Aug. 27, 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
"No matter what the theorists did -- even with the most advanced computer simulation techniques -- they could not reproduce the experiments," said Millot.
From Science Daily ● Aug. 20, 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
By the time the controversy ended, six physicists had departed the lab, including all four of its theorists.
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.
