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Synonyms

countless

American  
[kount-lis] / ˈkaʊnt lɪs /

adjective

  1. too numerous to count; innumerable.

    the countless stars.
    Synonyms:
    unlimited, myriad, endless, numberless
countless British  
/ ˈkaʊntlɪs /

adjective

  1. innumerable; myriad

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • countlessly adverb

Etymology

Origin of countless

First recorded in 1580–90; count 1 + -less

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.

Like countless diarists before her, including Samuel Pepys, Anaïs Nin, Beatrix Potter and David Sedaris, the woman had kept a record of her days with ink and paper.

From The Wall Street Journal • Apr. 6, 2026

What’s more, there are countless small yet memorable visual and narrative details to adore — things that, at first sight, look like bizarre directorial choices, but ultimately operate in the service of this gonzo story.

From Salon • Apr. 5, 2026

Palantir’s FDEs used and tested it, making countless iterations to the platform.

From MarketWatch • Apr. 4, 2026

After an hour on a freeway passing through suburban towns of countless rows of identical worker housing, we turned onto a more rustic road, headed into the country’s mountainous region.

From Slate • Mar. 30, 2026

That day, Bobby was not the old curmudgeonly Bobby: He was gracious, humorous, and willing to sign countless autographs.

From "Endgame" by Frank Brady

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.