Widely known; familiar or famous: a well-known performer. (adjective)
Fully known: well-known facts. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "well-known" in a sentence
"As Blowfly, Reid primarily parodied if that's the word well-known pop singles by rewriting their lyrics along hypersexual and scatological lines."
"On each occasion, he has offered us nothing beyond Alinsky's name, as though he were referring to as well-known a person as, for example, Steven Spielberg or Paula Abdul."
"In a Los Angeles courtroom, two big industries are going after each other over the definition of a word well-known by every first-grader: sugar."