1. D-flat major - Noun
2. D-flat major - Adjective
D-flat major (uncountable)
(music) a major key with five flats with the notes D♭, E♭, F, G♭, A♭, B♭, C
D-flat major (not comparable)
(music) describing a piece, song, or scale that has a D-flat major key
The D-flat major theme that dominates the music for the second act ballet seems like a new melody to many audience members. Source: Internet