Noun

(en noun)

A political upheaval in a government or nation state characterized by great change.

The removal and replacement of a government.

Rotation: the turning of an object around an axis.

* 1912 , P. M. Heldt, The Gasoline Automobile: Its Design and Construction, Volume II: Transmission, Running Gear and Control , The Horseless Age Co. (1913), page 147:

The ratio between the speeds of revolution of wheel and disc is substantially equal to the reciprocal of the ratio between the diameter of the wheel and the diameter of the mean contact circle on the disc.

A rotation: one complete turn of an object during rotation.

* 1864 , D. M. Warren, The Common-School Geography , Revised Edition, H. Cowperthwait & Co., page 6:

The Earth has two motions: a daily revolution (or turning around) upon its axis , and a yearly course around the sun.

* 1878 , George Fleming, A Text-Book of Veterinary Obstetrics , Baillière, Tindall, & Cox, page 123:

Numerous cases are recorded which incontestibly prove that during pregnancy, the uterus perform a half or even a complete revolution , on itself, producing torsion of the cervix

In the case of celestial bodies - the traversal of one body through an orbit around another body.

A sudden, vast change in a situation, a discipline, or the way of thinking and behaving.

Noun

(en noun)

Something invented.

* 1944 November 28, Irving Brecher and Fred F. Finklehoffe, Meet Me in St. Louis , Metro-Goldwyn-Mayer:

Warren Sheffield is telephoning Rose long distance at half past six. Personally, I wouldn't marry a man who proposed to me over an invention .

* {{quote-magazine, date=2013-10-05, volume=409, issue=8856, magazine=(The Economist)

, title= The widening gyre , passage=British inventions have done more to influence the shape of the modern world than those of any other country. Many—football, the steam engine and Worcestershire sauce, to take a random selection—have spread pleasure, goodwill and prosperity. Others—the Maxim gun, the Shrapnel shell and jellied eels—have not.}}

The act of inventing.

* {{quote-magazine, year=2013, month=September-October, author=(Henry Petroski)

, magazine=(American Scientist), title= The Evolution of Eyeglasses , passage=Digging deeper, the invention of eyeglasses is an elaboration of the more fundamental development of optics technology. The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,

The capacity to invent.

(music) A small, self-contained composition, particularly those in J.S. Bach’s Two-'' and ''Three-part Inventions .

* 1880 , (George Grove) (editor and entry author), , page 15, Invention:

INVENTION .?A term used by J. S. Bach, and probably by him only, for small pianoforte pieces?—?15 in 2 parts and 15 in 3 parts?—?each developing a single idea, and in some measure answering to the Impromptu of a later day.

(label) The act of discovering or finding; the act of finding out; discovery.