- The definition of countless is too many to be counted or too numerous to measure.
The blades of grass spread across the entire earth are an example of something that would be described as countless.
countless definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
too many to count; innumerable; myriad
countless definition by American Heritage Dictionary
Incapable of being counted; innumerable. See Synonyms at incalculable.
- countˈless·ly adverb