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Meaning of instrument

in•stru•ment

Pronunciation: (in'stru-munt), [key]
— n.
  1. a mechanical tool or implement, esp. one used for delicate or precision work: surgical instruments.
  2. a contrivance or apparatus for producing musical sounds: a stringed instrument.
  3. a means by which something is effected or done; agency: an instrument of government.
  4. a device for measuring the present value of a quantity under observation.
  5. a mechanical or electronic measuring device, esp. one used in navigation: landing a plane by instruments.
  6. a formal legal document, as a draft or bond: negotiable instruments.
  7. a person used by another merely as a means to some private end; tool or dupe.
—v.t.
  1. to equip with instruments, as a machine or manufacturing process: to instrument a space vehicle.
  2. to arrange a composition for musical instruments; orchestrate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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