a kind of summit musical meeting

[Vladv1]

"Ritchie and I had discussed it late into thenight on many occasions; we wanted Rainbow to be a kind of summit musical meeting between heavy rock and heavy classical themes. What I wrote wasn’t poetry, but it was written to say something more than “baby, I love you.” It had to; the music Ritchie and I were now writing demanded it".

"Rainbow In The Dark", Ronnie James Dio.

Is "summit" an adjective here?

 

[emsr2d2]

In that context, yes.