a city in the tribe of Judah, to the west of Hebron, whose king was slain by Joshua, Joshua 12:15 . It is frequently mentioned in the history of Saul and David; and is chiefly memorable from the cave in its neighbourhood, where David retired from Achish, king of Gath, when he was joined by the distressed and discontented, to the number of four hundred, over whom he became captain, 1 Samuel 22:1 . Judas Maccabaeus encamped in the plain of Adullam, where he passed the Sabbath day, 2Ma_12:38 . Eusebius says that, in his time, Adullam was a very great town, ten miles to the east of Eleutheropolis.