prélude[Français]

nom
1 : music that precedes a fugue or introduces an act in an opera
2 : orchestral music played at the beginning of an opera or oratorio
3 : mutual sexual fondling prior to sexual intercourse
4 : mutual sexual fondling prior to sexual intercourse
5 : something that serves as a preceding event or introduces what follows
6 : mutual sexual fondling prior to sexual intercourse
verbe
1 : play as a prelude