I. known 1 /nəʊn $ noʊn/ BrE AmE
the past participle of ↑ know 1
II. known 2 W3 BrE AmE adjective
[ Word Family: adjective : ↑ knowing , ↑ knowledgeable , ↑ known ≠ ↑ unknown ; noun : ↑ knowledge , the unknown; adverb : ↑ knowingly ≠ ↑ unknowingly , ↑ knowledgeably ; verb : ↑ know ]
1 . [only before noun] used about something that people know about or have discovered:
a study of all the known facts
her last known address
Apart from vaccines, there is no known way to protect against meningitis.
2 . [only before noun] a known criminal, drug dealer etc is someone who people know to be regularly involved in criminal activities or to do other things that are disapproved of:
He was found with several other known sex offenders.
a known liar
3 . be known for something to be famous or known about by a lot of people because of something:
He’s known for his good looks.
The region is known for its fine wines.
4 . well-known/little-known/lesser-known used when saying how famous someone is:
works by lesser-known French artists