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 study course idiom[ C/U ]   songs   plural A’s or As in Western music, the sixth Be aware in the scale (= number of notes) that starts around the Take note C, or possibly a set of notes dependant on this NoticeA is usually accustomed to denote some thing or a