n.

1. 革命，革命运动[C][U]
   The American Revolution gave independence to the Colonies.

   美国独立战争使十三个州得到了独立。

2. 革命性剧变，大变革[C][（+in）]
   The automobile caused a revolution in our way of traveling.

   汽车使旅行的方式发生了根本性的变化。

3. （天体的）运行，公转[C][U][（+round）]
   One revolution of the earth around the sun takes a year.

   地球绕太阳运行一周需一年时间。

4. 回转，旋转[C]
   They spin at 400-500 revolutions per minute.

   它们每分钟旋转四百到五百周。

5. 循环，（一）周期[U][C]
   The annual revolution of the earth round the sun causes the revolution of the seasons.

   地球每年绕太阳公转而形成四季循环。

n.

1. a forcible overthrow of a government or social order, in favour of a new system.
   ▸(in Marxism) the class struggle expected to lead to political change and the triumph of communism.
2. a dramatic and wide-reaching change:
   marketing underwent a revolution.
3. an instance of revolving.
   ▸motion in orbit or in a circular course or round an axis or centre.
   ▸the single completion of an orbit or rotation.