instrument

a device that requires skill for proper use

the means whereby some act is accomplished

a person used by another to gain an end

(law) a document that states some contractual relationship or grants some right

the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process

any of various devices or contrivances that can be used to produce musical tones or sounds

That by means of which any work is performed, or result is effected; a tool; a utensil; an implement; as, the instruments of a mechanic; astronomical instruments.

equip with instruments for measuring, recording, or controlling

write an instrumental score for

address a legal document to

To perform upon an instrument; to prepare for an instrument; as, a sonata instrumented for orchestra.