Recorded since about 1440, borrowed from Middle French convention, from Latin conventiō (“meeting, assembling; agreement, convention”), from conveniō (“come, gather or meet together, assemble”), from con- (“with, together”) + veniō (“come”). Doublet of convent, coven and covin.
convention (plural conventions)
- A meeting or gathering.
- A formal deliberative assembly of mandated delegates.
- The convening of a formal meeting.
- A formal agreement, contract or pact.
- (international law) A treaty or supplement to such.
- A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom.