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 program idiom[ C/U ]   audio   plural A’s or As in Western audio, the sixth Notice in the scale (= series of notes) that commences on the Notice C, or simply a set of notes depending on this Take note?a? could be the 3rd-most-commonly utilized letter in Engli