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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.

Maybe Kagan sought to prevent the majority opinion from undermining countless other state laws that restrict speech in the medical context.

From Slate • Mar. 31, 2026

The squeeze on supply has pushed oil and natural gas prices higher, with drastic knock-on effects for supply chains in countless industries.

From Barron's • Mar. 30, 2026

I’ve heard from countless readers, especially within the past year, complaining about typos.

From The Wall Street Journal • Mar. 29, 2026

But then, in a moment that countless big-name players to come would experience through the decades, Law saw his low shot saved by a diving Ian McKechnie.

From BBC • Mar. 28, 2026

I have kicked up dust, left countless tracks across wide swathes of open waves of sand that glow in the daylight from the sun and turn dark black at night.

From "A Rover's Story" by Jasmine Warga

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.