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  • noun
    A tool or implement, especially one for delicate or scientific work. (a surgical instrument)
    A measuring device used to gauge the level, position, speed, etc. of something, especially a motor vehicle or aircraft.
    An object or device for producing musical sounds. (a percussion instrument)
    A formal document, especially a legal one. (execution involves signature and unconditional delivery of the instrument)
    Equip (something) with measuring instruments.


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