- past participle of know.
known
Americanverb
noun
verb
adjective
noun
Etymology
Origin of known
First recorded in 1300–50, for the adjective
Explanation
Something known is something people are aware of or know about. Don’t ask a known thief to walk your dog while you’re out of town, especially if she is known as the “Poodle Poacher.” When you know something, it’s in your memory and awareness. When something is known, you know it! Technically, known is the past participle of know. Cigarettes are known to cause cancer. Martin Luther King is known as a hero to Americans. Cassius Clay is known as Muhammad Ali. If you stay out late and get in trouble, you should’ve known better. Something known is established, and people don't have reason to doubt it.
Vocabulary lists containing known
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The band became known for their ever-evolving sound.
From BBC ● Jul. 15, 2026
In the first experiment, the researchers placed a large crystal, known as the monolith, beside a regular rock of similar size.
From Science Daily ● Jul. 15, 2026
Some analysts say AI has brought a new dimension to the dramatic boom-and-bust cycles the memory chip industry is known for.
From Barron's ● Jul. 15, 2026
Silver said his “timeline remains this summer” to make his findings known after high-powered New York law firm Wachtell, Lipton, Rosen & Katz wraps up its investigation and presents the findings to the NBA.
From Los Angeles Times ● Jul. 15, 2026
I’ve known for three years now that I’m gluten intolerant.
From "Red Flags and Butterflies" by Sheryl Azzam
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
