All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases with a collision training course idiom[ C/U ]   songs   plural A’s or As in Western tunes, the sixth Take note in the scale (= series of notes) that commences on the Notice C, or simply a set of notes according to this ObserveIn algebra, the letter a in conjunction with a var