A-flat major
Noun
Meaning
(music) The major key with A-flat as its tonic, consisting of the pitches A♭, B♭, C, D♭, E♭, F, and G.
(music) The major chord with a root of A-flat.
Source: en.wiktionary.orgExamples
His next work, a polonaise in A-flat major of 1821, dedicated to Żywny, is his earliest surviving musical manuscript.
That same moment, the sudden, temporary leap into A-flat major, had pierced his imagination.