verb
simple past and past participle of key
adjective
(mechanics, engineering, of a joint between components) Having a key, mated to a keyseat and/or keyway, to either control or prevent movement.
(Internet slang, originally 4chan slang) Praiseworthy and admirable, often through exhibiting independence and security; based.
(slang, African-American Vernacular) Intoxicated by recreational or illegal drugs; drunk or high.