corroborate
Americanverb (used with object)
adjective
verb
adjective
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serving to corroborate a fact, an opinion, etc
-
(of a fact) corroborated
Other Word Forms
Derived Forms
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noncorroboratoryadjective
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uncorroborativelyadverb
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uncorroborativeadjective
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corroborativelyadverb
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corroboratorilyadverb
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uncorroboratedadjective
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corroborationnoun
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noncorroboratingadjective
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noncorroborativeadjective
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corroborativeadjective
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corroboratoryadjective
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uncorroboratoryadjective
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noncorroborativelyadverb
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corroboratornoun
Conjugated Forms
Present
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have corroboratedperfect
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has corroboratedperfect 3rd person singular
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have been corroboratingperfect progressive
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corroboratingparticiple
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are corroboratingprogressive
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corroboratessingular 3rd person
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is corroboratingprogressive 3rd person singular
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am corroboratingprogressive 1st person singular
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has been corroboratingperfect progressive 3rd person singular
Past
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had corroboratedperfect
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had been corroboratingperfect progressive
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were corroboratingprogressive plural
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corroboratedparticiple
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was corroboratingprogressive singular
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corroboratedsimple
Future
Etymology
Origin of corroborate
First recorded in 1520–30; from Latin corrōborātus, past participle of corrōborāre “to strengthen,” equivalent to cor- “with, together” + rōbor(āre) “to make strong” (derivative of rōbor, rōbur “oak” hence, “strength”) + -ātus past participle suffix; see cor-, robust, -ate 1
Compare meaning
How does corroborate compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
To corroborate is to back someone else’s story. If you swear to your teacher that you didn't throw the spitball, and your friends corroborate your story by promising that you were concentrating on math homework, she might actually believe you. For example, a witness in court corroborates the testimony of others, and further experimentation can corroborate a scientific theory. Near synonyms are substantiate and confirm. Corroborate, originally meaning "to support or strengthen," was borrowed from Latin corrōborāre, formed from the prefix cor- "completely" plus rōborāre "to strengthen" (from rōbur "strength").
Vocabulary lists containing corroborate
The Crucible
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Grade 10, List 3
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100 SAT words Beginning with "C"
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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.
Recent layoffs at Epic Games, the maker of “Fortnite,” corroborate Gallagher’s concerns.
From MarketWatch • May 23, 2026
The bank spent months on the review but lacked specifics to corroborate allegations in the complaint, one person familiar with the matter said.
From The Wall Street Journal • May 6, 2026
Breadth indicators corroborate “this extreme oversold condition, supporting a bullish medium-to-long-term outlook for both the sector and the broader market.”
From Barron's • Mar. 19, 2026
While there are ways to further corroborate one’s identity, some experts warn the bureaucratic burden may turn people off registering altogether due to complications — preventing citizens from being able to cast a ballot.
From Salon • Feb. 13, 2026
Galileo now rushed to publish his discoveries, which transformed astronomy in the space of a few months—the time it took for others to acquire telescopes with which they could corroborate his findings.
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.
