Rabbah (răb'bah), greatness. The chief city and capital of the Ammonites. Joshua 13:25. Its full name is "Rabbath of the children of Ammon." Deuteronomy 3:11 A. V. It is also called "Rabbath of the Ammonites." Ezekiel 21:20 A. V. Greek and Roman writers call it "Philadelphia," a name given by Ptolemy Philadelphus, by whom it was rebuilt. Its modern name is Amman. Rabbath was situated on the upper Jabbok, about 22 miles east of the Jordan.