Noun

(en noun)

A device used to produce music.

The violinist was a master of her instrument .

A means or agency for achieving an effect.

* {{quote-book, year=1905, author=

, title= , chapter=1 citation , passage=“There the cause of death was soon ascertained?; the victim of this daring outrage had been stabbed to death from ear to ear with a long, sharp instrument , in shape like an antique stiletto, which […] was subsequently found under the cushions of the hansom. […]”}}

A measuring or displaying device.

The instrument detected an increase in radioactivity.

A tool, implement used for manipulation or measurement.

The dentist set down his tray of instruments'''.'' The scientist recorded the temperature with a thermometer but wished he had a more accurate ' instrument ."

(legal) A legal document, such as a contract, deed, trust, mortgage, power, indenture, or will.

A bond indenture is the instrument that gives a bond its value.

Negotiable instruments are the foundation of the debt markets.

(figuratively) A person used as a mere tool for achieving a goal.

* Shakespeare

Or useful serving man and instrument , / To any sovereign state.

* Dryden

The bold are but the instruments of the wise.

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.