A-sharp major UK /ˈeɪ ʃɑːp ˈmeɪ.dʒə/US /ˈeɪ ʃɑɹp ˈmeɪ.dʒɚ/ noun2 •The theoretical major key with A-sharp as its tonic and the notes A#, B#, C𝄪, D#, E#, F𝄪, and G𝄪. •The major chord with a root of A-sharp.
