(literally) To display the flag of one's country, especially as an expression of patriotic pride.

plural of flag officer

(games) A game normally played by children, or as part of paintball, in which two teams have a flag which is stored at the other team's base. Whichever team returns their flag to their own base first is the winner.

(transitive, US, idiomatic) To claim as deserving support for patriotic reasons.

The flag of Great Britain or the United Kingdom. / (nautical, Britain) The flag flown on ships of the government of Great Britain or the United Kingdom.

(soccer) A linesman's flag that is equipped with a button that causes a receiver (typically worn by the referee) to buzz, thus warning him of the flag's use.

plural of buzzer flag

A version of American football where the players must remove a flag, worn around the waist, from the ball carrier instead of tackling.

plural of sweet flag

Alternative spelling of chequered flag