Open English Wordnet
Nouns
(n)military officer, officerany person in the armed services who holds a position of authority or command“an officer is responsible for the lives of his men”
(n)officeholder, officersomeone who is appointed or elected to an office and who holds a position of trust“he is an officer of the court”, “the club elected its officers for the coming year”
(n)officer, ship's officera person authorized to serve in a position of authority on a vessel“he is the officer in charge of the ship's engines”