rev·o·lu·tion P Pronunciation Key n.
a. Orbital motion about a point, especially as distinguished from axial rotation: the planetary revolution about the sun.
b. A turning or rotational motion about an axis.
c. A single complete cycle of such orbital or axial motion.
2. The overthrow of one government [or entity] and its replacement with another.
3. A sudden or momentous change in a situation: the revolution in computer technology.
You forgot a couple definitions in there, Omen.