Revolution

1. the action by a celestial body of going round in an orbit or elliptical course

2. the time taken by a celestial body to make a complete round in its orbit

3. the rotation of a celestial body on its axis

4. a sudden, radical, or complete change

5. a fundamental change in political organization

especially : the overthrow or renunciation of one government or ruler and the substitution of another by the governed

a: activity or movement designed to effect fundamental changes in the socioeconomic situation

b: a fundamental change in the way of thinking about or visualizing something: a change of paradigm