n a device that requires skill for proper use
n the means whereby some act is accomplished
n a person used by another to gain an end
n (law) a document that states some contractual relationship or grants some right
n the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process
n any of various devices or contrivances that can be used to produce musical tones or sounds
v equip with instruments for measuring, recording, or controlling
v write an instrumental score for
v address a legal document to