Easton's Bible Dictionary (1897)
Built fortress, a city and fortress of Moab, the modern Kerak, a small town on the brow of a steep hill about 6 miles from Rabbath-Moab and 10 miles from the Dead Sea; called also Kir-haresh, Kir-hareseth, Kir-heres (Isa. 16:7, 11; Jer. 48:31, 36). After the death of Ahab, Mesha, king of Moab (see MOABITE STONE), threw off allegiance to the king of Israel, and fought successfully for the independence of his kingdom. After this Jehoram, king of Israel, in seeking to regain his supremacy over Moab, entered into an alliance with Jehoshaphat, king of Judah, and with the king of Edom.
The three kings led their armies against Mesha, who was driven back to seek refuge in Kir-haraseth. The Moabites were driven to despair. Mesha then took his eldest son, who would have reigned in his stead, and offered him as a burnt-offering on the wall of the fortress in the sight of the allied armies. ” The invaders evacuated the land of Moab, and Mesha achieved the independence of his country (2 Kings 3:20-27).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
KIR-HAR'ASETH (brick-fortress), 2 Kgs 3:26, or KIR-HAR'ESETH, Isa 16:7, or KIR-HA'-RESH, Isa 16:11, or KIR-HERES, Jer 58:41, Eze 23:36, or simply KIR OF MOAB, Isa 15:1, a strong fortress in Moab, situated near the south-eastern shore of the Dead Sea. It is now called Kerak, and was in the time of the crusaders a place of great strength, almost impregnable.