known

/noʊn/

/nəʊn/

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. adjective

   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 mapped out or investigated

   unheard-of

   previously unknown

   unidentified

   not yet identified