countless

adjective

count·​less ˈkau̇nt-ləs How to pronounce countless (audio)
Synonyms of countlessnext
: too numerous to be counted : myriad, many
countlessly adverb

Synonyms of countless

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Examples of countless in a Sentence

There are countless reasons why that would not be a good idea. I've been there countless times.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
From perfumes and synthetic flavorings to plastics and resins, acetaldehyde is a chemical used to make countless everyday products. — Rupendra Brahambhatt, Interesting Engineering, 2 Aug. 2026 In the early days, the two cousins spent countless early mornings mixing cookie dough, late nights scrubbing kitchens, and weekends wondering whether the business would survive another week. — Preston Fore, Fortune, 2 Aug. 2026 Diners included the Beatles, Mick Jagger, Muhammad Ali, Lynn Redgrave, and countless other celebrities, politicians, and nobility. — David Szondy august 01, New Atlas, 1 Aug. 2026 His songs have become part of the American soundtrack, turning up in movies, television, commercials and countless high school graduation videos. — Jamie Graziano, Charlotte Observer, 31 July 2026 See All Example Sentences for countless

Word History

First Known Use

1593, in the meaning defined above

Time Traveler
The first known use of countless was in 1593

Browse Nearby Words

counting tube
countless
count noun
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Cite this Entry

“Countless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/countless. Accessed 6 Aug. 2026.

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Kids Definition

countless

adjective
count·​less ˈkau̇nt-ləs How to pronounce countless (audio)
: too numerous to be counted : innumerable

More from Merriam-Webster on countless

Nglish: Translation of countless for Spanish Speakers

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