All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases on the collision system idiom[ C/U ]   new music   plural A’s or As in Western tunes, the sixth Take note in the scale (= number of notes) that starts around the Take note C, or maybe a set of notes according to this Be awareWhen The traditional Greeks adopted the alphabet, t