countless
Americanadjective
adjective
Other Word Forms
Derived 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.
The body uses them to create and repair tissues, produce enzymes, and support countless biological functions.
From Science Daily • Jun. 15, 2026
TONOPAH, Nev. — Some years ago, Harry Chahal and his wife were on a trip to Las Vegas when, like countless motorists before and since, they passed through this high desert speck of a town.
From Los Angeles Times • Jun. 14, 2026
As they repeated countless times Saturday night on that confetti-covered Texas floor, they were a team.
From The Wall Street Journal • Jun. 14, 2026
It turned countless people into inconsiderate monsters, even in the most minute ways.
From Salon • Jun. 13, 2026
After carrying countless kettlefuls to the green beans that morning, my arms felt as if they would fall right out of my shoulder sockets.
From "Hattie Big Sky" by Kirby Larson
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.
