captain

nouns

an officer holding a rank below a major but above a lieutenant
is derived from
domain category
the military forces of a nation
"their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
is a type of (narrower)
a commissioned officer in the Army or Air Force or Marine Corps
the naval officer in command of a military ship
is derived from
a policeman in charge of a precinct
is derived from
an officer who is licensed to command a merchant ship
is derived from
the leader of a group of people
"a captain of industry"
the pilot in charge of an airship
is derived from
a dining-room attendant who is in charge of the waiters and the seating of customers

verbs

be the captain of a sports team
is a type of (narrower)
be in charge of
"Who is heading this project?"