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 class idiom[ C/U ]   new music   plural A’s or As in Western music, the sixth Take note in the dimensions (= series of notes) that begins on the Take note C, or maybe a set of notes depending on this NoticeA is frequently utilized to denote some thing or an i