an overthrow or repudiation and the thorough replacement of an established government or political system by the people governed.
2.
Sociology. a radical and pervasive change in society and the social structure, especially one made suddenly and often accompanied by violence.
Compare social evolution.
3.
a sudden, complete or marked change in something:
the present revolution in church architecture.
4.
a procedure or course, as if in a circuit, back to a starting point.
5.
a single turn of this kind.