instrument


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instrument

1. Music any of various contrivances or mechanisms that can be played to produce musical tones or sounds
2. a measuring device, such as a pressure gauge or ammeter
3. 
a. a device or system for use in navigation or control, esp of aircraft
b. (as modifier): instrument landing
4. a formal legal document

Instrument

 

a tool of human labor or an actuating mechanism of a machine, which “takes hold of an object of labor and alters it in an expedient fashion” (K. Marx, in K. Marx and F. Engels, Soch., 2nd ed., vol. 23, p. 384).

Instruments are divided into the following categories: (1) cutting (cutter, drill, broach, milling cutter), (2) pressing (stamp, knurl), (3) polishing (polishing wheel, whetstone), (4) percussion (hammer, chisel, punch), and (5) fastening-clamping (machine tool chuck, cutter tool post, vise, tongs). Various devices, apparatus, and equipment used in science and technology for measurements and other procedures and in medicine and veterinary science for surgical operations, therapeutic procedures, and research are also called instruments.

instrument

[′in·strə·mənt]
(engineering)
A device for measuring and sometimes also recording and controlling the value of a quantity under observation.

instrument

A device using an internal mechanism to show visually or aurally the attitude, altitude, or operation of an aircraft or an aircraft part. It includes electronic devices for automatically controlling an aircraft in flight.

instrument

(programming)
To install devices or instructions into hardware or software to monitor the operation of a system or component.
References in classic literature ?
Weston was the most used of the two to yield; till a little bustle in the room shewed them that tea was over, and the instrument in preparation; and at the same moment Mr.
I observed in the king's kitchen all sorts of mathematical and musical instruments, after the figures of which they cut up the joints that were served to his majesty's table.
The instrument of voluntary association executed on board the "Mayflower" testifies that the parties to it had anticipated the improvement of their nation.
Once, in an interval of silence upon the part of the receiving instrument, I moved the sending-key up and down a few times.
I shall not know," replied Alvarez, "that the Coldwater passes thirty; nor shall any other man aboard know it," and, with his words, he drew a revolver from his pocket, and before either I or Johnson could prevent it had put a bullet into every instrument upon the bridge, ruining them beyond repair.
At the period when the Gun Club essayed their great experiment, such instruments had reached a high degree of perfection, and produced some magnificent results.
But then, at a distance which for three hours in the morning did not exceed sixty-five miles, and in a medium free from all atmospheric disturbances, these instruments could reduce the lunar surface to within less than
Would you admit them into our State when you reflect that in this composite use of harmony the flute is worse than all the stringed instruments put together; even the panharmonic music is only an imitation of the flute?
An instrument is "reliable" with respect to a given set of stimuli when to stimuli which are not relevantly different it gives always responses which are not relevantly different.
In the evening the young girl and her companion were employed in various occupations which I did not understand; and the old man again took up the instrument which produced the divine sounds that had enchanted me in the morning.
The golden koa, the king of woods," Mercedes was crooning over the instrument.
In pleasant conversation of this sort they passed out of the tent into the wood, and the day was spent in visiting some of the posts and hiding-places, and then night closed in, not, however, as brilliantly or tranquilly as might have been expected at the season, for it was then midsummer; but bringing with it a kind of haze that greatly aided the project of the duke and duchess; and thus, as night began to fall, and a little after twilight set in, suddenly the whole wood on all four sides seemed to be on fire, and shortly after, here, there, on all sides, a vast number of trumpets and other military instruments were heard, as if several troops of cavalry were passing through the wood.