conventions

plural of convention

(countable, uncountable) A meeting or gathering.
(countable, uncountable) A formal deliberative assembly of mandated delegates.
(countable, uncountable) The convening of a formal meeting.
(countable, uncountable) A formal agreement, contract, rule, or pact.
(countable, uncountable) A treaty or supplement to such.
(countable, uncountable) A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom.