AR.—A city on the Arnon, the border between Moab and the Amorites (Num_21:15, Deu_2:9), now Wâdy Môjib. It is called Ar Moab (Num_21:28, Isa_15:1),’Î Moab (Num_22:35), and ‘the city that is in the valley’ (Deu_2:36 etc.). It is possibly the ruin seen by Burckhardt in the valley below the junction of the Lejjûn and the Môjib.