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  • noun
    A tool or implement, especially one for precision work. (a surgical instrument)
    A measuring device used to gauge the level, position, speed, etc. of something, especially a motor vehicle or aircraft. (a new instrument for measuring ozone levels)
    (the value of learning to play a musical instrument)
    A formal or legal document. (execution involves signature and unconditional delivery of the instrument)
    Equip (something) with measuring instruments. (engineers have instrumented rockets to study the upper atmosphere)


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