司sī 1.主持;操作;经营{take charge of; manage; operate}: ～机{driver}|～炉{stoker}|各～其事。{each manages his own affairs} 2.中央部一级机关里的一个部门{department (under a ministerial-level organization)}: 人事～{Human Resources Department}|外交部礼宾～。{Protocol Department of the Ministry of Foreign Affairs} 3.(Sī)姓。{a surname}