Rephaim (rĕph'a-ĭm or re-phâ'im), Valley of. Joshua 15:8; Joshua 18:16; and translated "the valley of the giants" in the A. V., but vale of "Rephaim" in the R. V. It was one of the landmarks of the land of Judah, named after the Rephaim, or "giants," who at an early period were found on both sides of the Jordan. Comp. Genesis 14:5; Deuteronomy 3:11-13; Joshua 13:12; Joshua 17:15. David twice defeated the Philistines in this valley. 2 Samuel 5:17-25; 2 Samuel 23:13; 1 Chronicles 11:15-16; 1 Chronicles 14:9-16. The valley was noted for its fertility. Isaiah 17:5. Its position as a boundary of Judah would indicate it to have been south of the valley of Hinnom.