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")
(bound form) superfluous, (bound form) (of a man) to move into the household of one's in-laws after marrying; (of the bride's parents) to have the groom join one's household