countless
Americanadjective
adjective
Other Word Forms
Etymology
Origin of countless
Explanation
Countless means more than you could possibly count. If you have countless reasons why you love living in New York, there are so many reasons that you can't list them all. Countless is a good adjective to use when you want to emphasize how endless, huge, or immeasurable something is. Your could say that smoke detectors save countless lives each year, or that your principal has tried countless times to ban soda at school, only to be outvoted by the student council over and over. The word dates from the 16th century, from the verb count, with its Old French root, conter, "add up."
Vocabulary lists containing countless
Much Ado: Synonyms for "Many"
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Talk Like Shakespeare Day, List 6
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"Dogs at Work"
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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.
He has slashed .234/.357/.486 over 1,039 regular-season games with the club, anchoring lineups alongside countless big-name teammates while evolving into a trustworthy defender.
From Los Angeles Times ● Aug. 17, 2026
Most obviously, it’s exceedingly rare, as countless studies and state audits have found.
From Salon ● Aug. 15, 2026
They attend concerts, meet career coaches, reserve study rooms, download software, join student organizations, and participate in countless campus activities without ever reaching for a wallet.
From The Wall Street Journal ● Aug. 14, 2026
It was a moving atmosphere, immortalised by the countless phones raised to capture photos and videos of that precise instant.
From Barron's ● Aug. 12, 2026
There were, however, countless times she found herself dangling in the safety harness, forearms aching, fingertips throbbing, after yet another failed attempt.
From "City Spies" by James Ponti
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.
