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 ]   tunes   plural A’s or As in Western songs, the sixth Be aware in the scale (= number of notes) that begins within the note C, or possibly a set of notes according to this Observe[four] The Roman form ⟨a⟩ is found in most printed mate