The act of meeting.

聚会；集会。

A formal meeting; esp. a social, commercial, or political assembly.

正式会议(尤指社交、商业、政治等集会)。

A diplomatic agreement.

外交协定；条约。

General rule of conduct or behavior.

行为规范；惯例。

A fixed custom or usage.

惯例；习俗。