- 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.
- widely or generally known; famous or notorious
- thoroughly known
- Widely known; familiar or famous: a well-known performer.
- Fully known: well-known facts.
(comparative more wellknown, superlative most wellknown)
- (nonstandard) Alternative form of well-known.
(comparative better-known or more well-known, superlative best-known or most well-known)