- (commandant) commanding officer: an officer in command of a military unit
- Commandant (or) is a senior title often given to the officer in charge of a large training establishment or academy. This usage is common in anglophone nations. In some non-English speaking countries it may be a military or police title or rank.
- (Commandant (rank)) Commandant (or) is a military or police rank. In the French, Spanish and Irish armed forces it is a rank equivalent to major. In South Africa for most of the second half of the 20th century, commandant was a rank equivalent to lieutenant-colonel in other countries.
- The Commandant of the U.S. Coast Guard.
- (Commandant) A Babylonian PGP title (šikin ṭēmi) for the administrative official in charge of running an entire city.
- (Commandant) Alpha Hirogen takes on the persona of Commandant Karr in the World War II simulation on Holodeck 1; the Commandant was sent to Sainte Claire to oversee the occupation of the city; he served with Rommel in North Africa and Schmidt in Poland; he is a formidable military stategist and ...
- (Commandant) Special Operations School - Philippine Army Training Command, Fort Magsaysay, Nueva Ecija; 1986-1987
- (Commandant) The administrator, usually a retired military or naval officer, responsible for "student life" (including discipline and the performance of military duties) at AMA; the equivalent of a dean of residential life and a vice-principal.
- (Commandant) The highest ranking officer in the Starfleet Marine Corps.
- (Commandant) The office in charge of cadet life, leadership and housing. Similar to a Dean of Students (Abvr: CMDT)
- (commandant) A commander of a Nazi camp. In the death camps the commandant was required to witness every gassing carried out through a peephole, and supervise both the preparations and the aftermath.