instrument

Noun

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

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

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

• a person used by another to gain an end

• the means whereby some act is accomplished
  • my greed was the instrument of my destruction
    
  • science has given us new tools to fight disease
    

• a device that requires skill for proper use

Verb

• address a legal document to

• write an instrumental score for

• equip with instruments for measuring, recording, or controlling

Related words

• Synonyms: 
  musical instrument , instrumental role , legal document , legal instrument , official document , pawn , cat's-paw , tool , instrumentate