All G&A a/c A/D a/r A/S a/s/l C/A See all meanings Idioms and phrases on a collision course idiomAbout a thousand bce, in Byblos and various Phoenician and Canaanite centres, the signal was supplied a linear type (three), the supply of all later kinds. In Semitic languages this indication was known as alephWhen the ancient Greeks adopted the alphab