1. making something happen: playing an important part in achieving a result or accomplishing a purpose She was instrumental in getting the legislation passed.
2. music for instruments, not voices: performed on a musical instrument or instruments, not with the voice
3. connected with instruments: done with or produced by an instrument or instruments instrumental readings
4. grammar indicating means of doing something: describes a noun case that indicates that something is used for a purpose or is the means by which something is done
5. philosophy of instrumentalism: relating to instrumentalism
noun (pluralin·stru·men·tals)
Definition:
1. music music played by instruments: a piece of music that is performed on a musical instrument or instruments, not with the voice
2. grammar noun form indicating means: the instrumental case, or a noun in the instrumental case
