All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases on a collision class idiom[ C/U ]   songs   plural A’s or As in Western audio, the sixth Observe in the scale (= series of notes) that starts around the Observe C, or simply a list of notes depending on this Notice[four] The Roman sort ⟨a⟩ is found in most printed materia