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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.

All my countless calls to Social Security, with one question they could never answer, were resolved by the mailman today.

From MarketWatch

She spent countless hours as a teenager in the 1990s working at her family’s Chinese-food restaurant at the mall near their home and hanging out with friends.

From The Wall Street Journal

The brain relies on countless chemical messages to keep its networks running smoothly.

From Science Daily

Among the countless startups in this space is Brooklyn, N.Y.-based Vermeer, which began by building visual navigation systems for cinematography drones.

From The Wall Street Journal

"The result is that countless Londoners are spending so much just to keep a roof over their heads that they can't afford the basics. This is the everyday reality of the housing crisis."

From BBC

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.