›[C]MEETINGSa large, formal meeting of people who work in the same industry or belong to the same organization or profession: a convention of shopping center developershold/host a conventionMadrid will host next year's convention.go to/attend a conventionOver 2,000 people attended the convention in Philadelphia.
›[C]GOVERNMENTan official agreement between governments that makes rules relating to a particular activity: convention on sththe European Convention on Human Rightssign/ratify a conventionOne hundred and twenty countries signed a convention banning the use of the pesticides.
›[C or U]the accepted or traditional method of doing something, or an example of doing something in the traditional way: Bureaucracy and corporate convention can be an obstacle when facing new business challenges.Unwritten conventions do not have the same value as signed agreements.