Exercise your brain, games you didn’t know existed to fight brain decline and ageing.

Revolution: orbital motion about a point especially as distinguished from axial rotation.

The planetary revolution about the sun. A turning or rotation or motion about an axis. A single complete cycle of such orbital or axial motion.

The overthrow of one government and its replacement with another, a sudden or momentous change in a situation: the revolution in computer technology.

Geology: a time of major crustal deformation, when folds and faults are formed.

The American Heritage Dictionary of the English language