Dictionary.net

Hell, or the place of torment; primarily a place south-east of Jerusalem which, in consequence of its having been the site of the revolting Moloch worship, had been allowed to be used as a place for burning the refuse of the city, and from which a smoke was constantly rising.

In Scrip., a place lying south-east of Jerusalem, in the valley of Hinnom, where fire was continually kept burning; hell.

n. [Hebrew] A place lying southeast of Jerusalem, in the valley of Hinnom, where fires were continually kept to burn dead carcases, and where all the filth of the city was poured; hence, hell.