Meaning : Any person in the armed services who holds a position of authority or command.
Example :
An officer is responsible for the lives of his men.
Synonyms : military officer
Meaning : Someone who is appointed or elected to an office and who holds a position of trust.
Example :
He is an officer of the court.
The club elected its officers for the coming year.
Synonyms : officeholder
Meaning : A member of a police force.
Example :
It was an accident, officer.
Synonyms : police officer, policeman
Meaning : A person authorized to serve in a position of authority on a vessel.
Example :
He is the officer in charge of the ship's engines.
Synonyms : ship's officer