known

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.

Definitions of known
1

adj apprehended with certainty

“a known quantity”
“the limits of the known world”
“a musician known throughout the world”
“a known criminal”
Synonyms:
acknowledged
recognized or made known or admitted
familiar
well known or easily recognized
glorious
having or deserving or conferring glory
best-known
most familiar or renowned
better-known
more familiar or renowned than the other of two
celebrated, famed, famous, far-famed, illustrious, notable, noted, renowned
widely known and esteemed
identified
having the identity known or established
legendary
so celebrated as to having taken on the nature of a legend
proverbial
widely known and spoken of
well-known
widely or fully known
Antonyms:
unknown
not known
unacknowledged
not recognized or admitted
unfamiliar
not known or well known
inglorious
not bringing honor and glory
chartless, uncharted, unmapped
(of unknown regions) not yet surveyed or investigated
little-known
unknown to most people
unbeknown, unbeknownst
(usually used with `to') occurring or existing without the knowledge of
undiagnosed
eluding diagnosis
undiscovered, unexplored
not yet discovered
unheard-of
previously unknown
unidentified
not yet identified
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