openingsong

noun
UK /ˈəʊpənɪŋ sɒŋ/
US /ˈoʊpənɪŋ sɔːŋ/

A song that plays at the start of a show or movie.

The opening song got everyone excited for the cartoon.


OTHER MEANINGS

2. The first song performed in a concert or musical.

The band began with a lively opening song.

3. A song sung at the beginning of a ceremony or event.

The choir's opening song welcomed all the guests.

4. The first track on an album.

Track one is a short opening song that sets the mood.