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:
"What we see here is not a detail of one particular material, but a general physical principle," says Fakher Assaad from the University of Würzburg, lead theorist of the work.
From Science Daily ● Jul. 8, 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
Do you ever get the sense that your Twitter algorithm thinks that you, yourself, are a conspiracy theorist?
From Slate ● May 7, 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
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
These are not anti-imperial theorists armed with smartphones.
From The Wall Street Journal ● Jun. 14, 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
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.
