What is "coele-syria"

Coele-Syria, Coele Syria, Coelesyria (, Koílē Syría), also rendered as Coelosyria and Celesyria, otherwise Hollow Syria (, ), was a region of Syria in classical antiquity. It probably derived from the Aramaic for all of the region of Syria but more often was applied to the Beqaa Valley between the Lebanon and Anti-Lebanon mountain ranges. The area now forms part of the modern nations of Lebanon, Syria and Israel.