a person in command of a ship or boat
a pilot of a civil aircraft
in the Royal Navy and US Navy, an officer ranking below a commodore and above a commander
in the army, marines, and some air forces, an officer ranking below a major and above a lieutenant
a leader of a team, esp a sports team
a dominant figure
captains of industry
NAmer a fire or police officer
captaincy /-si/ noun
captainship noun
[Middle English capitane via Old French from late Latin capitaneus chief, from Latin capit-, caput head]