instrumental
adjective
1. relating to or designed for or performed on musical instruments
- instrumental compositions
- an instrumental ensemble
2. acting helpful; serviceable; essential.
- instrumental in solving the crime
Similar word(s): helpful, implemental, subservient
Sentences with instrumental as an adjective:
- He was instrumental in conducting the business.
- instrumental music
- the instrumental case
noun
1. (uncountable, grammar) The instrumental case.
2. (countable, music) A composition without lyrics.