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 study course idiom[ C/U ]   audio   plural A’s or As in Western music, the sixth Observe in the dimensions (= series of notes) that commences within the note C, or maybe a list of notes based upon this NoticeA is frequently utilized to denote some thing or so