- any person in the armed services who holds a position of authority or command;
"an officer is responsible for the lives of his men"
- someone 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"
- a member of a police force;
"it was an accident, officer"
- a person authorized to serve in a position of authority on a vessel;
"he is the officer in charge of the ship's engines"