instrument in WordNet English dictionary

1. the means whereby some act is accomplished
   "my greed was the instrument of my destruction"; "science has given us new tools to fight disease"
   instrument  tool 
   
2. a device that requires skill for proper use
   instrument 
   
3. any of various devices or contrivances that can be used to produce musical tones or sounds
   musical instrument  instrument 
   
4. (law) a document that states some contractual relationship or grants some right
   legal document  legal instrument  official document  instrument 
   
5. the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process
   instrumental role  instrument 
   

1. address a legal document to
   instrument 
   
2. write an instrumental score for
   instrument  instrumentate 
   
3. equip with instruments for measuring, recording, or controlling
   instrument