1. accepted ways of behaving or doing things in a society or group
2. large formal meetings or conferences, especially for people with shared interests
3. formal agreements between countries or groups
Usage: diplomatic; legal

Examples

• Social conventions require us to shake hands when meeting someone new.
• The comic book convention attracted thousands of fans from around the world.
• The Geneva Conventions establish rules for humanitarian treatment during war.
• Shakespeare often broke theatrical conventions of his time.
• Business conventions dictate formal dress codes in many offices.
• The political convention will nominate the party's presidential candidate.
• Literary conventions like rhyme schemes help structure poetry.