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 new music, the sixth Observe in the scale (= number of notes) that starts around the Observe C, or even a list of notes determined by this Be aware?a? is the 3rd-most-typically utilized letter in English