conventions >> /kənˈvɛnʃ(ə)n/
Definition: [noun] A way in which something is usually done.
Example: to attract the best patrons the movie houses had to ape the conventions and the standards of theatres
Definition: [noun] An agreement between states covering particular matters, especially one less formal than a treaty.
Example: the convention, signed by the six states bordering on the Black Sea, aims to prevent further pollution
Definition: [noun] A large meeting or conference, especially of members of a political party or a particular profession or group.
Example: the party held its biennial convention
Definition: [noun] 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.
Example: B.J. Herbison's Playing Pinochle page describes a variation of Single Deck Pinochle, and a detailed set of suggested bidding conventions.