1. 谋反；叛乱；反叛
    A rebellion is a violent organized action by a large group of people who are trying to change their country's political system.

    e.g. The British soon put down the rebellion.
           英国人很快平息了叛乱。
    e.g. ...the ruthless and brutal suppression of rebellion.
           对谋反无情、残酷的镇压

2. 内讧；（来自政党内部的）反抗
    A situation in which politicians show their opposition to their own party's policies can be referred to as a rebellion .

    e.g. There was a Labour rebellion when some left-wing MPs voted against the Chancellor's tax cuts...
           工党内部发生内讧，一些左翼国会议员对财政大臣提出的减税政策投了反对票。