What it means

1. noun a person authorized to serve in a position of authority on a vessel
   “he is the officer in charge of the ship's engines”
2. noun any person in the armed services who holds a position of authority or command
   “an officer is responsible for the lives of his men”
3. noun someone who is appointed or elected to an office and who holds a position of trust
   “he is an officer of the court”
4. noun a member of a police force
   “it was an accident, officer”
5. verb direct or command as an officer