Instrument

A device used to produce music.

"The violinist was a master of her instrument."

A means or agency for achieving an effect.

A measuring or displaying device.

"The instrument detected an increase in radioactivity."

A tool, implement used for manipulation or measurement.

"The dentist set down his tray of instruments."

To apply measuring devices.

To devise, conceive, cook up, plan.

To perform upon an instrument; to prepare for an instrument.

"a sonata instrumented for orchestra"