1. 典礼;(宗教)仪式
    A ritual is a religious service or other ceremony which involves a series of actions performed in a fixed order.

    e.g. This is the most ancient, and holiest of the Shinto rituals...
           这是最古老、最神圣的神道教仪式。
    e.g. These ceremonies were already part of pre-Christian ritual in Mexico.
           这些仪式已经成为墨西哥基督教时期以前的宗教仪式的一部分。

2. 仪式性的;传统的
    Ritual activities happen as part of a ritual or tradition.

    e.g. ...fastings and ritual dancing.
           斋戒和传统舞蹈
    e.g. ...an act of ritual suicide.
           仪式性的自杀行为

3. 风俗;习惯
    A ritual is a way of behaving or a series of actions which people regularly carry out in a particular situation, because it is their custom to do so.

ritual的反义词

    e.g. The whole Italian culture revolves around the ritual of eating...
           整个意大利的文化都以饮食习惯为中心。
    e.g. Cocktails at the Plaza was a nightly ritual of their sophisticated world.
           到广场饭店喝鸡尾酒是他们这个高雅时髦的圈子中的人每晚必做的事情。

4. 例行公事般的;习惯性的;老规矩的
    You can describe something as a ritual action when it is done in exactly the same way whenever a particular situation occurs.

ritual在线翻译

    e.g. I realized that here the conventions required me to make the ritual noises.
           我意识到此时按照惯例我应该说些客套话。