Noun
1. an officer holding a rank below a major but above a lieutenant
2. the naval officer in command of a military ship
3. a policeman in charge of a precinct
4. an officer who is licensed to command a merchant ship
5. the leader of a group of people;
"a captain of industry"6. the pilot ins charge of an airship
7. a diningroom attendant who is in charge of the waiters and the seating of customers