1) General subject: commissioned officer, mustang, non combatant, non-combatant, officer, swab, swob, commander, army officer
2) Military: catering officer, commissioned officer, departure airfield control officer, element, military officer (ВС), officer, ordnance officer
3) Law: military officer
5) Jargon: Sam Brown, occifer, ossifer
6) leg.N.P. commissioned officer (military- law), officer (military- law)
Универсальный русско-английский словарь. Академик.ру. 2011.