The captain of a flagship in the Royal Navy.

A heroic person, particularly one with exaggerated bravery and leadership characteristics.

Anyone who wishes to save the environment with an ambitious plan.

(humorous, usually derogatory, sarcastic, very often preceded with thank you) Someone who makes superfluous or obvious statements.

(now historical) A commander-in-chief; the head of an armed force.

A supervisor of bellhops in a hotel.

A prominent business person who owns or is the highest-ranking executive of one or more major firms, especially one who has considerable wealth and influence.

(sports) A player who takes on the responsibilities of captain when the captain is not playing.

(military) a military rank for a field officer above that of captain and below that of major

(military, nautical) a captain in command of a fleet, convoy or flotilla