Instrumental | Mean of instrumental in English Dictionary

/ˌɪnstrəˈmɛntl̟/

• very important in helping or causing something to happen or be done
1. He was instrumental in organizing the club. = He played an instrumental part/role in organizing the club.
2. Her influence was instrumental in bringing the painting to the museum.
• written for or performed on musical instruments
1. They played instrumental music at the wedding.
2. an instrumental version of a song