A-flat major
noun
University
1
The major key with A-flat as its tonic, with the notes A♭, B♭, C, D♭, E♭, F, and G, the key signature of which has four flats.
2
The major chord with a root of A-flat.
The major key with A-flat as its tonic, with the notes A♭, B♭, C, D♭, E♭, F, and G, the key signature of which has four flats.
The major chord with a root of A-flat.