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 course idiom[ C/U ]   songs   plural A’s or As in Western tunes, the sixth note in the scale (= number of notes) that starts on the Observe C, or perhaps a list of notes determined by this Take note?a? will be the third-most-typically applied letter in Englis