1.Definition: a member of a police force

"It was an accident, officer"

Related Noun(s):police officer, policeman

Category: People

2.Definition: a person authorized to serve in a position of authority on a vessel

"He is the officer in charge of the ship's engines"

Category: People

3.Definition: any person in the armed services who holds a position of authority or command

"An officer is responsible for the lives of his men"

Related Noun(s):military officer

Category: People

4.Definition: 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"

Related Noun(s):officeholder

Category: People