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 1789 1789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。