to be the beginning of something:
A haunting oboe solo introduces the third movement of the concerto.
C2 to speak or write before the beginning of a performance, programme or book and give information about it; to tell an audience about the person who is going to speak, sing, etc. :
The director will introduce the film personally at its premiere.
This is the first official biography of her and it is introduced by her daughter.
I'd now like to introduce our next guest, who will be singing songs from her latest album.