convention

1. A large formal meeting of people who belong to the same profession or organization, or who have similar interests. 2. A generally accepted way of behaving or doing something that is based on tradition or common agreement, often an unwritten rule. 3. A formal agreement, especially between countries, on a particular matter.

• The city will host the annual science fiction convention next summer. — その都市は来夏、毎年恒例のSF大会を主催するだろう。
• Breaking with social conventions can sometimes lead to new discoveries. — 社会的慣習を打ち破ることが、時に新しい発見につながることもある。
• The Geneva Convention sets out the international humanitarian law for armed conflict. — ジュネーブ条約は、武力紛争における国際人道法を定めている。

To convene or call together a formal meeting or assembly.

• The board of directors decided to convention an emergency meeting to discuss the crisis. — 取締役会は危機を議論するために緊急会議を招集することを決定した。
• Delegates from various nations will convention in New York to address global climate change. — 各国の代表者が地球規模の気候変動に対処するため、ニューヨークで会合するだろう。