convention Definition

convention
noun

1. A large and formal conference or assembly.

Thesaurus: assembly, gathering, meeting, convocation.
2. A formal treaty or agreement.
3. A custom or generally accepted practice, especially in social behaviour.

Thesaurus: tradition, custom, practice, habit, usage, fashion, precept.
4. US politics.
A meeting of delegates from one party to nominate a candidate for office.

Etymology: 15c: from Latin conventio meeting or agreement.