1. 习俗;惯例;常规
    A convention is a way of behaving that is considered to be correct or polite by most people in a society.

    e.g. It's just a social convention that men don't wear skirts...
           男人不穿裙子只是一种社会习俗。
    e.g. Despite her wish to defy convention, she had become pregnant and married at 21.
           尽管她不想遵循传统习俗，但她还是在21岁的时候就怀孕并且结婚了。

2. (艺术、文学、戏剧中的)传统做法，传统风格
    In art, literature, or the theatre, a convention is a traditional method or style.

    e.g. We go offstage and come back for the convention of the encore.
           按照加演的传统做法，我们走到后台后又再次返场。
    e.g. ...the stylistic conventions of Egyptian art.
           埃及艺术的传统风格

3. (国家或组织间的)公约，协定，协约
    A convention is an official agreement between countries or groups of people.

    e.g. ...the UN convention on climate change.
           联合国有关气候变化的公约
    e.g. ...the Geneva convention.
           日内瓦公约

4. (组织、政治团体的)大会，大型会议
    A convention is a large meeting of an organization or political group.

convention的翻译

    e.g. ...the annual convention of the Society of Professional Journalists.
           职业新闻工作者协会年度大会
    e.g. ...the Republican convention.
           共和党代表大会