A-flat major /ˈeɪ flæt ˈmeɪ.dʒə(ɹ)/ noun2 •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.
