a way in which something is usually done

to attract the best patrons the movie houses had to ape the conventions and the standards of theatres

an agreement between states covering particular matters, especially one less formal than a treaty

the convention, signed by the six states bordering on the Black Sea, aims to prevent further pollution

a large meeting or conference, especially of members of a political party or a particular profession or group

the party held its biennial convention

a bid or system of bidding by which the bidder tries to convey specific information about the hand to their partner, as opposed to seeking to win the auction