Easton's Bible Dictionary

=Topheth, from Hebrews toph "a drum," because the cries of children here sacrificed by the priests of Moloch were drowned by the noise of such an instrument; or from taph or toph, meaning "to burn," and hence a place of burning, the name of a particular pNoah Webster's New International Dictionary of the English Language

(n.) A place lying east or southeast of Jerusalem, in the valley of Hinnom.