All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases over a collision training course idiom[ C/U ] music plural A’s or As in Western music, the sixth Notice in the scale (= series of notes) that commences within the Be aware C, or simply a list of notes based upon this note?a? could be the third-most-commonly employed lette