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 ]   songs   plural A’s or As in Western songs, the sixth Be aware in the scale (= series of notes) that begins on the Observe C, or a list of notes determined by this Observe?a? is the 3rd-most-generally utilised letter in English s