Smith's Bible Dictionary (1863)
(a city), or Ar of Moab, one of the chief places of Moab. (Numbers 21:28; Isaiah 15:1) In later times the place known as Areopolis and Rabbath-Moab. The site still called Rabba . It lies about halfway between Kerak and the Wady Mojeb, 10 or 11 miles from each, the Roman road passing through it.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
AR, and AR OF MO'AB. Num 21:28. The chief city of Moab, on the east of the Salt Sea; called also Aroer, Deut 2:36; sometimes used for the whole land of Moab, Deut 2:29; burned by Sihon. Num 21:26-30. It has been placed at Rabbah or Rabbath, but good authorities regard it as a different city, and fix Ar on the Arnon, 10 or 12 miles north of Rabbah, at the Wady Lejum. See Rabbah.
Hitchcock's Bible Names (1869)
awakening; uncovering