Open English Wordnet
Nouns
(n)instrument, toolthe means whereby some act is accomplished“my greed was the instrument of my destruction”, “science has given us new tools to fight disease”
(n)legal document, legal instrument, official document, instrument(law) a document that states some contractual relationship or grants some right
(n)instrumental role, instrumentthe semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process
(n)musical instrument, instrumentany of various devices or contrivances that can be used to produce musical tones or sounds
