(anc. geog.), a valley in the suburbs, and to the east of Jerusalem, either a part of or conjoined with the valley of Kidron, (Joshua); infamous for sacrificing children, or palling them through the fire. The place in the valley where the idol stood to which the sacrifice was made, was called Tophet, 2 Kings xxiii. 10. Jer. vii. 31, 32; and xix. 2., from beating drums or tabours to drown the cries or shrieks of the children: called also Geenon or the Valley of Ennon: whence some derive Gehenna, the place of future punishment.