1 [C,U] action taken by a large group of people to try to change the government of a country, especially by violent action 革命:
the French Revolution of 17891789年法国大革命a country on the brink of revolution快要爆发革命的国家
2 [C] a revolution (in sth) a complete change in methods, opinions, etc, often as a result of progress (方法、见解等的)彻底改变,革命:
the Industrial Revolution工业革命
3 [C,U] a movement around sth; one complete turn around a central point (for example in a car engine) 旋转;(围绕中心)转动一周:
400 revolutions per minute每分钟400转☞Look at rev ². 参看rev^2。