commandant

Compared meaning: an officer in charge of troops or a place (noun).

比较义项：指挥官，负责军事力量、行动或机构的军官（名词）。

• commander

  A general term for anyone leading a military force or operation; used broadly for active command in the field, across many ranks and services.

  泛指统率某支军事力量或指挥某次行动的人；常用于战场或行动中的现场指挥，适用于各军种和各级军官。

  The commander ordered his troops to retreat before nightfall.

  指挥官下令部队在天黑前撤退。

• commandant 本词

  Refers specifically to the officer who heads a military place or institution, such as an academy, camp, or garrison; more administrative in tone.

  特指负责某一军事场所或机构（如军校、营地、要塞）的主管军官，语气更偏行政管理。

  The commandant runs the military academy with strict discipline.

  司令官以严格的纪律管理这所军事学院。

Commander and commandant both mean an officer in charge. Commander is broad, used for anyone leading a military force or operation. Commandant is narrower: the officer who heads a specific military place or group of soldiers, with a more formal, administrative tone.

两词都指“负责指挥的军官”，但侧重不同：commander 泛指统率某支部队或行动的人，范围较广；commandant 专指某一军事场所或一群士兵的主管军官，常带有“机构负责人”的意味，语气更正式、更偏行政管理。