officer

nouns

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

verbs

direct or command as an officer
officer
is a type of (narrower)
be in command of
"The general commanded a huge army"
command