to enter; to go into, to join; to become a member of, (bound form) to conform to (as in 入時|入时[ru4 shi2]), abbr. for 入聲|入声[ru4 sheng1], (on product packaging, after {number n} + {classifier}) containing (n pieces) (from Japanese 入 "iri")
(after a verb or adjective) one who (is) ..., (after a noun) person involved in ..., -er, -ist, (used after a number or 後|后[hou4] or 前[qian2] to refer to sth mentioned previously), (used after a term, to mark a pause before defining the term), (old) (used at the end of a command), (old) this