Revolution: From the latin words, re + volvere, volgere, which means to roll back, turn back around or return.
Definition:
1 a (1) : the action by a celestial body of going round in an orbit or elliptical course; also : apparent movement of such a body round the earth (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 axisb : completion of a course (as of years); also : the period made by the regular succession of a measure of time or by a succession of similar eventsc (1) : a progressive motion of a body around an axis so that any line of the body parallel to the axis returns to its initial position while remaining parallel to the axis in transit and usually at a constant distance from it (2) : motion of any figure about a center or axis <revolution of a right triangle about one of its legs generates a cone> (3) :rotation 1b
2 a : a sudden, radical, or complete changeb : a fundamental change in political organization;especially : the overthrow or renunciation of one government or ruler and the substitution of another by the governedc : activity or movement designed to effect fundamental changes in the socioeconomic situationd : a fundamental change in the way of thinking about or visualizing something : a change of paradigm <the Copernican revolution>e : a changeover in use or preference especially in technology
As we witness revolutions breaking out all over the world, it seems that revolution and change are the only things that will always remain constant.