overture

US /ˈoʊ.vɚ.tʃɚ/
UK /ˈoʊ.vɚ.tʃɚ/
"overture" picture
1.

an orchestral piece at the beginning of an opera, oratorio, or other extended work.

:
The opera began with a dramatic overture.
The composer wrote a beautiful overture for the ballet.
2.

an introduction to something more substantial.

:
His speech was an overture to a new policy.
The peace talks were seen as an overture to a lasting agreement.
3.

an approach or proposal made to someone with the aim of opening negotiations or establishing a relationship.

:
The company made an overture to their competitor for a merger.
She rejected his romantic overtures.