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 program idiom[ C/U ]   new music   plural A’s or As in Western audio, the sixth note in the size (= series of notes) that commences within the Take note C, or even a list of notes dependant on this Be awareWhen the ancient Greeks adopted the alphabet, that they