in·stru·men·tal 
/ˌɪnstrəˈmɛntl̟/ adjective
/ˌɪnstrəˈmɛntl̟/ adjective 1 [more instrumental; most instrumental] : very important in helping or causing something to happen or be done — often + in ▪ He was instrumental in organizing the club. = He played an instrumental part/role in organizing the club. ▪ Her influence was instrumental in bringing the painting to the museum. 2 music : written for or performed on musical instruments : not including singing
▪ They played instrumental music at the wedding. ▪ an instrumental version of a song
▪ They played instrumental music at the wedding. ▪ an instrumental version of a song
— in·stru·men·tal·ly /ˌɪnstrəˈmɛntl̟i/ adverb
▪ an instrumentally and vocally beautiful song ▪ He was instrumentally involved in the organization of the club.
/ˌɪnstrəˈmɛntl̟i/ adverb ▪ an instrumentally and vocally beautiful song ▪ He was instrumentally involved in the organization of the club.
