known

/noʊn/
noun
  1. A person or thing that is familiar or recognized (usually in the phrase 'the known').
    • The map showed only the known, leaving blank spaces for mystery.
    • The explorer ventured beyond the known into uncharted territory.
    • In science, we build on the known to discover the unknown.
adjective
  1. Recognized, familiar, or identified by many people.
    • She is a known expert in ancient history.
    • The restaurant is known for its delicious pasta.
    • He used a known shortcut to avoid traffic.
  2. Publicly acknowledged or established as a fact.
    • There are no known side effects of the medication.
    • The cause of the fire is not yet known.
    • It is a known fact that exercise improves health.
Antonyms
verb
  1. Past participle of know: to have information or awareness of something.
    • I have known her since elementary school.
    • She has known the answer all along.
    • They had known about the meeting for weeks.