Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Too many to be counted; innumerable. synonym: incalculable.

from The Century Dictionary.

  • Incapable of being counted; without ascertained or ascertainable number; innumerable.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Incapable of being counted; not ascertainable; innumerable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Too many to count; innumerable or incalculable

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective too numerous to be counted

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

count +‎ -less

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Examples

  • Throughout my life I have used the word countless thousands of times and given many great comfort when I did use it.

    NEVER WAVE GOODBYE DOUG MAGEE 2010

  • Mr. �NOAM CHOMSKY (Former Professor, Massachusetts Institute of Technology): He studied what he called the countless small actions of unknown people that lead to the great moments that enter the historical record.

    Blogtimore, Hon The Daily Breather 2010

  • Your books contain countless references to musical work -- everything from rock to opera to jazz.

    A Conversation with Peter Robinson 2010

  • Not only was our regular route structure an adventurer's dream, but Pan Am was often called upon to participate in countless evacuations and missions of mercy, which added to our sense of excitement and expansiveness.

    Helen Davey: Tales of Pan Am: "The Pool" Helen Davey 2010

  • I've been in countless arguments that can be definitively altered just by stating ones background or identity.

    Sex and the single Marvel super heroine | Robot 6 @ Comic Book Resources – Covering Comic Book News and Entertainment 2009

  • People are no longer looking like people and while this strange display is laid out in countless magazine editorials for countless years now, could it be that this increasingly peculiar parade of bizarrely enhanced features is finally striking a cord with the public and celebrities?

    Anna De Souza: Is 40 the New 50? Anna De Souza 2010

  • Not only was our regular route structure an adventurer's dream, but Pan Am was often called upon to participate in countless evacuations and missions of mercy, which added to our sense of excitement and expansiveness.

    Helen Davey: Tales of Pan Am: "The Pool" Helen Davey 2010

  • Not only was our regular route structure an adventurer's dream, but Pan Am was often called upon to participate in countless evacuations and missions of mercy, which added to our sense of excitement and expansiveness.

    Helen Davey: Tales of Pan Am: "The Pool" Helen Davey 2010

  • Brooks, and Chief Dave Snowden, who authorized me to train countless times on city time.

    Heroes or Villains? 2010

  • Not only was our regular route structure an adventurer's dream, but Pan Am was often called upon to participate in countless evacuations and missions of mercy, which added to our sense of excitement and expansiveness.

    Helen Davey: Tales of Pan Am: "The Pool" Helen Davey 2010

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