a mechanical tool or implement, esp. one used for delicate or precision work

surgical instruments.

a contrivance or apparatus for producing musical sounds

a stringed instrument.

a means by which something is effected or done; agency

an instrument of government.

a device for measuring the present value of a quantity under observation.

a mechanical or electronic measuring device, esp. one used in navigation

landing a plane by instruments.

a formal legal document, as a draft or bond

negotiable instruments.

a person used by another merely as a means to some private end; tool or dupe.

to equip with instruments, as a machine or manufacturing process

to instrument a space vehicle.

to arrange a composition for musical instruments; orchestrate.

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noun

apparatus , appliance , contraption , contrivance , device , doodad * , equipment , gadget , gear , gizmo * , machine , machinery , mechanism , paraphernalia , tackle , utensil , agency , channel , factor , force , instrumentality , material , medium , ministry , organ , vehicle , wherewithal , agent , instrumentation , intermediary , cat\'s-paw , dupe , puppet , stooge , tool , implement , means