n. [ F. instrument, L. instrumentum. See Instruct. ] [ 1913 Webster ]

1. That by means of which any work is performed, or result is effected; a tool; a utensil; an implement; a device; as, the instruments of a mechanic; astronomical instruments. [ 1913 Webster ]

All the lofty instruments of war. Shak. [ 1913 Webster ]

2. A contrivance or implement, by which musical sounds are produced; as, a musical instrument. [ 1913 Webster ]

Praise him with stringed instruments and organs. Ps. cl. 4. [ 1913 Webster ]

But signs when songs and instruments he hears. Dryden. [ 1913 Webster ]

3. (Law) A writing, as the means of giving formal expression to some act; a writing expressive of some act, contract, process, as a deed, contract, writ, etc. Burrill. [ 1913 Webster ]

4. One who, or that which, is made a means, or is caused to serve a purpose; a medium, means, or agent; as, their army was primarily an instrument of oppression. [ 1913 Webster +PJC ]

Or useful serving man and instrument,
To any sovereign state. Shak. [ 1913 Webster ]

The bold are but the instruments of the wise. Dryden.

Syn. -- Tool; implement; utensil; machine; apparatus; channel; agent. [ 1913 Webster ]

v. t. 1. To perform upon an instrument; to prepare for an instrument; as, a sonata instrumented for orchestra. [ 1913 Webster ]

2. To furnish or equip with instruments; to attach instruments to; as, the fighter planes were heavily instrumented; the patient was instrumented to monitor him remotely. [ PJC ]

a. [ Cf. F. instrumental. ] [ 1913 Webster ]

1. Acting as an instrument; serving as a means; contributing to promote; conductive; helpful; serviceable; as, he was instrumental in conducting the business. [ 1913 Webster ]

The head is not more native to the heart,
The hand more instrumental to the mouth. Shak. [ 1913 Webster ]

2. (Mus.) Pertaining to, made by, or prepared for, an instrument, esp. a musical instrument; as, instrumental music, distinguished from vocal music. “He defended the use of instrumental music in public worship.” Macaulay. [ 1913 Webster ]

Sweet voices mix'd with instrumental sounds. Dryden. [ 1913 Webster ]

3. (Gram.) Applied to a case expressing means or agency; as, the instrumental case. This is found in Sanskrit and Russian as a separate case, but in Greek it was merged into the dative, and in Latin into the ablative. In Old English it was a separate case, but has disappeared, leaving only a few anomalous forms. [ 1913 Webster ]

Instrumental errors, those errors in instrumental measurements, etc., which arise, exclusively from lack of mathematical accuracy in an instrument. [ 1913 Webster ]

n. (Philos.) The view that the sanction of truth is its utility, or that truth is genuine only in so far as it is a valuable instrument. -- In`stru*men"tal*ist, n.

Instrumentalism views truth as simply the value belonging to certain ideas in so far as these ideas are biological functions of our organisms, and psychological functions whereby we direct our choices and attain our successes. Josiah Royce. [Webster 1913 Suppl.]

n. One who plays upon an instrument of music, as distinguished from a vocalist. [ 1913 Webster ]

n.; pl. Instrumentalities The quality or condition of being instrumental; that which is instrumental; anything used as a means; medium; agency. [ 1913 Webster ]

The instrumentality of faith in justification. Bp. Burnet. [ 1913 Webster ]

The discovery of gunpowder developed the science of attack and defense in a new instrumentality. J. H. Newman. [ 1913 Webster ]

adv. 1. By means of an instrument or agency; as means to an end. South. [ 1913 Webster ]

They will argue that the end being essentially beneficial, the means become instrumentally so. Burke. [ 1913 Webster ]

2. With instruments of music; as, a song instrumentally accompanied. Mason. [ 1913 Webster ]

n. Usefulness or agency, as means to an end; instrumentality. [ R. ] Hammond. [ 1913 Webster ]

a. Instrumental. [ R. ] [ 1913 Webster ]

n. 1. The act of using or adapting as an instrument; a series or combination of instruments; means; agency. [ 1913 Webster ]

Otherwise we have no sufficient instrumentation for our human use or handling of so great a fact. H. Bushnell.

2. (Mus.) (a) The arrangement of a musical composition for performance by a number of different instruments; orchestration; instrumental composition; composition for an orchestra or military band. (b) The act or manner of playing upon musical instruments; performance; as, his instrumentation is perfect.

3. The act of using instruments to measure or control the behavior of an object, as a patient in a hospital or a machine being tested while under development. [ PJC ]

4. The act of furnishing or attaching instruments to/ [ PJC ]

5. The set of instruments included in a system; as, a harvester with modern instrumentation. [ PJC ]