P.M.

abbr.=<拉>post meridiem 下午; (=per minute)每分钟; (=pro memoria)为了纪念，以作纪念; (=purpose made)特制的，特殊用途的

形容词A.M.

1. 下午；午后
    p.m. is used after a number to show that you are referring to a particular time between 12 noon and 12 midnight.

    e.g. The spa closes at 9:00 pm.
           休闲健身中心晚上9点关门。