All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases over a collision training course idiom[ C/U ]   music   plural A’s or As in Western music, the sixth Observe in the scale (= series of notes) that begins within the Observe C, or simply a list of notes based upon this note[4] The Roman variety ?a? is present in most printed m… Read More