(n.) A commander; the commanding officer of a place, or of a body of men; as, the commandant of a navy-yard.

ADC CO OD aide aide-de-camp brigadier brigadier general bull captain castellan chatelain chatelaine chicken colonel chief of staff colonel commander commander in chief commanding officer commissioned officer company officer custodian director exec executive executive officer field marshal field officer first lieutenant five-star general four-star general gaoler general general officer generalissimo governor guard guardian intendant jailer jemadar junior officer keeper lieutenant lieutenant colonel lieutenant general major major general manager marechal marshal master officer one-star general orderly officer principal keeper prison guard risaldar ruler screw senior officer shavetail sirdar staff officer subahdar subaltern sublieutenant the Old Man the brass three-star general top brass turnkey two-star general warden warder