- The definition of well known is someone or something many people are aware of or have knowledge of.
An example of a well-known actor is Brad Pitt or any other famous celebrity who everyone has heard of.
well-known 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.
- widely or generally known; famous or notorious
- thoroughly known
well-known definition by American Heritage Dictionary
- Widely known; familiar or famous: a well-known performer.
- Fully known: well-known facts.