commanding officer(n = noun.person) commandant, commander - an officer in command of a military unit;
is a kind of military officer, officer
has particulars: saclant, supreme allied commander atlantic, saceur, supreme allied commander europe, commander in chief, generalissimo, wing commander

action officer, air force officer, army officer, case officer, chief executive officer, chief financial officer, chief operating officer, chief petty officer, church officer, commanding, commissioned military officer, commissioned naval officer, commissioned officer, desk officer, disinfestation officer, executive officer, field officer, field-grade officer, financial officer, flag officer, general officer, hearing officer, intelligence officer, law officer, line officer, medical officer, military officer, naval officer, noncommissioned officer, officer, peace officer, petty officer, police officer, presiding officer, probation officer, prosecuting officer, returning officer, ship's officer, staff officer, supply officer, warrant officer