convention >> /kənˈvɛn(t)ʃ(ə)n/
Definition: [noun] A way in which something is usually done, especially within a particular area or activity.
Example: the woman who overturned so many conventions of children's literature
Definition: [noun] An agreement between countries 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.
Example: a convention of retail merchants
Definition: [noun] An artificial bid by which a bidder tries to convey specific information about the hand to their partner.
Example: B.J. Herbison's Playing Pinochle page describes a variation of Single Deck Pinochle, and a detailed set of suggested bidding conventions.