1. The movement of one celestial body which is in orbit around another one. It is often measured as the "orbital period".
2. An attempt to overthrow the existing form of a political organization, the principles of economic production and distribution, and the allocation of social status.
3. A rebellion in which a government is overthrown; usually, by force, and a new group of rulers takes over.

Sometimes the whole social order is overthrown.

4. Any large-scale change in society; such as, the Industrial Revolution which was also a cultural revolution.

The development of the microchip caused a revolution in the computer industry.

5. A drastic and far-reaching change in the ways of thinking and behaving.
6. Etymology: from the late 14th century, originally referring to celestial bodies, from Old French revolution, from Late Latin revolutionem, revolutio, "a revolving"; from Latin revolutus, revolvere, "to turn, to roll back".

Latin volvere, "to roll" with the prefix re-, "again" produced revolvere, "to roll back, to turn", which when filtered through French, became the English term revolve in the 14th century; originally, meaning "to change" and only taking on the meaning "orbit" in the late 1600's.

Revolution also came into English via French, in the late 14th century, with the original meaning of "the action of a celestial body moving in an orbit".

Over a period of time, revolution came to mean, "turning around" or "change", and by 1600, it acquired the meaning of "overthrow of the established order".

A term for the period in history beginning shortly before the Industrial Revolution: Mrs. Lawson taught her students about the Agricultural Revolution when significant improvements in agricultural production were achieved through such means as land reform, crop rotation, livestock improvements, and innovations in technology, for example, improved plows.

A period when major social and economic changes took place in Britain, Europe, and the United States in the late 18th and early 19th centuries when new machinery, new sources of electrical power, and new ways of manufacturing products were developed.

1. The social and economic changes brought about when the extensive mechanization of production systems resulted in a major shift from home manufacturing to large-scale factory production.
2. A complex of economic and social changes caused by the shift of production from hand or physical labor at home, or in small workshops, to mechanized systems in large factories; such as, in the weaving of textiles, etc.

1. A three-dimensional object that is shaped like a sphere, but is not perfectly round; such as, an ellipsoid or a geometric surface or a solid figure shaped like an oval.
2. Having a shape that is approximately spherical.
3. Any globular body, or one resembling a sphere.
4. An ellipsoid (a geometric surface or a solid figure shaped like an oval) generated by the rotation of an ellipse (a two-dimensional shape like a stretched circle with slightly longer flatter sides) around one of its axes or a straight line around which a geometric figure or a three-dimensional object is symmetrical.