Etymology

Noun

1. A meeting or gathering.

   The convention was held in Geneva.

2. A formal deliberative assembly of mandated delegates

   The EU installed an inter-institutional Convention to draft a European constitution

3. The convening of a formal meeting
4. A formal agreement, contract or pact
5. A treaty or supplement to such.

   The Vienna convention at the Vienna Congress (1814-15) standardized most of diplomatic conduct for generations

6. A generally accepted principle, method or behaviour.

   Table seatings are generally determined by tacit convention, not binding formal protocol

   The convention of driving on the right is reinforced by law.

Noun

1. An agreement
2. A formal meeting

   La convention sur l’avenir de l’Europe.

3. A conventionally standardised choice

   Par convention, le courant va du plus vers le moins.