Hinnom

Boyd’s Bible Dictionary:

And the border came down to the end of the mountain that lieth before the valley of the son of Hinnom, and which is in the valley of the giants on the north, and descended to the valley of Hinnom, to the side of Jebusi on the south, and descended to En-rogel, (Joshua 18:1616And the border came down to the end of the mountain that lieth before the valley of the son of Hinnom, and which is in the valley of the giants on the north, and descended to the valley of Hinnom, to the side of Jebusi on the south, and descended to En-rogel, (Joshua 18:16))
Children offered in sacrifice in
And they have built the high places of Tophet, which is in the valley of the son of Hinnom, to burn their sons and their daughters in the fire; which I commanded them not, neither came it into my heart. Therefore, behold, the days come, saith the Lord, that it shall no more be called Tophet, nor the valley of the son of Hinnom, but the valley of slaughter: for they shall bury in Tophet, till there be no place. (Jeremiah 7:31-3231And they have built the high places of Tophet, which is in the valley of the son of Hinnom, to burn their sons and their daughters in the fire; which I commanded them not, neither came it into my heart. 32Therefore, behold, the days come, saith the Lord, that it shall no more be called Tophet, nor the valley of the son of Hinnom, but the valley of slaughter: for they shall bury in Tophet, till there be no place. (Jeremiah 7:31‑32))
And go forth unto the valley of the son of Hinnom, which is by the entry of the east gate, and proclaim there the words that I shall tell thee, (Jeremiah 19:22And go forth unto the valley of the son of Hinnom, which is by the entry of the east gate, and proclaim there the words that I shall tell thee, (Jeremiah 19:2))
Because they have forsaken me, and have estranged this place, and have burned incense in it unto other gods, whom neither they nor their fathers have known, nor the kings of Judah, and have filled this place with the blood of innocents; (Jeremiah 19:44Because they have forsaken me, and have estranged this place, and have burned incense in it unto other gods, whom neither they nor their fathers have known, nor the kings of Judah, and have filled this place with the blood of innocents; (Jeremiah 19:4))
Therefore, behold, the days come, saith the Lord, that this place shall no more be called Tophet, nor The valley of the son of Hinnom, but The valley of slaughter. (Jeremiah 19:66Therefore, behold, the days come, saith the Lord, that this place shall no more be called Tophet, nor The valley of the son of Hinnom, but The valley of slaughter. (Jeremiah 19:6))
And they built the high places of Baal, which are in the valley of the son of Hinnom, to cause their sons and their daughters to pass through the fire unto Molech; which I commanded them not, neither came it into my mind, that they should do this abomination, to cause Judah to sin. (Jeremiah 32:3535And they built the high places of Baal, which are in the valley of the son of Hinnom, to cause their sons and their daughters to pass through the fire unto Molech; which I commanded them not, neither came it into my mind, that they should do this abomination, to cause Judah to sin. (Jeremiah 32:35))
Possibly identical with the valley of the vision
For it is a day of trouble, and of treading down, and of perplexity by the Lord God of hosts in the valley of vision, breaking down the walls, and of crying to the mountains. (Isaiah 22:55For it is a day of trouble, and of treading down, and of perplexity by the Lord God of hosts in the valley of vision, breaking down the walls, and of crying to the mountains. (Isaiah 22:5))
See TOPHET

Concise Bible Dictionary:

This is often called “the valley of the son of Hinnom,” but who Hinnom and his son were is unknown (Josh. 15:88And the border went up by the valley of the son of Hinnom unto the south side of the Jebusite; the same is Jerusalem: and the border went up to the top of the mountain that lieth before the valley of Hinnom westward, which is at the end of the valley of the giants northward: (Joshua 15:8); Josh. 18:1616And the border came down to the end of the mountain that lieth before the valley of the son of Hinnom, and which is in the valley of the giants on the north, and descended to the valley of Hinnom, to the side of Jebusi on the south, and descended to En-rogel, (Joshua 18:16); Neh. 11:3030Zanoah, Adullam, and in their villages, at Lachish, and the fields thereof, at Azekah, and in the villages thereof. And they dwelt from Beer-sheba unto the valley of Hinnom. (Nehemiah 11:30)). The valley running from east to west, on the south of Jerusalem, now bears the above name. In some part of this, supposed to be the east end, children were passed through the fire to false gods (Jer. 7:31-3231And they have built the high places of Tophet, which is in the valley of the son of Hinnom, to burn their sons and their daughters in the fire; which I commanded them not, neither came it into my heart. 32Therefore, behold, the days come, saith the Lord, that it shall no more be called Tophet, nor the valley of the son of Hinnom, but the valley of slaughter: for they shall bury in Tophet, till there be no place. (Jeremiah 7:31‑32); Jer. 32:3535And they built the high places of Baal, which are in the valley of the son of Hinnom, to cause their sons and their daughters to pass through the fire unto Molech; which I commanded them not, neither came it into my mind, that they should do this abomination, to cause Judah to sin. (Jeremiah 32:35)). To prevent this Josiah defiled TOPHETH in this valley (2 Kings 23:1010And he defiled Topheth, which is in the valley of the children of Hinnom, that no man might make his son or his daughter to pass through the fire to Molech. (2 Kings 23:10); 2 Chron. 28:33Moreover he burnt incense in the valley of the son of Hinnom, and burnt his children in the fire, after the abominations of the heathen whom the Lord had cast out before the children of Israel. (2 Chronicles 28:3); 2 Chron. 33:66And he caused his children to pass through the fire in the valley of the son of Hinnom: also he observed times, and used enchantments, and used witchcraft, and dealt with a familiar spirit, and with wizards: he wrought much evil in the sight of the Lord, to provoke him to anger. (2 Chronicles 33:6)). The prophet Isaiah gives the key to its being associated in the New Testament (under the name of GEHENNA) with eternal punishment: “Tophet is ordained of old; yea, for the king it is prepared; he hath made it deep and large: the pile thereof is fire and much wood; the breath of the Lord, like a stream of brimstone, doth kindle it” (Isa. 30:3333For Tophet is ordained of old; yea, for the king it is prepared; he hath made it deep and large: the pile thereof is fire and much wood; the breath of the Lord, like a stream of brimstone, doth kindle it. (Isaiah 30:33)). See HELL. In God’s judgments the valley shall become the “valley of slaughter” (Jer. 19:2-142And go forth unto the valley of the son of Hinnom, which is by the entry of the east gate, and proclaim there the words that I shall tell thee, 3And say, Hear ye the word of the Lord, O kings of Judah, and inhabitants of Jerusalem; Thus saith the Lord of hosts, the God of Israel; Behold, I will bring evil upon this place, the which whosoever heareth, his ears shall tingle. 4Because they have forsaken me, and have estranged this place, and have burned incense in it unto other gods, whom neither they nor their fathers have known, nor the kings of Judah, and have filled this place with the blood of innocents; 5They have built also the high places of Baal, to burn their sons with fire for burnt offerings unto Baal, which I commanded not, nor spake it, neither came it into my mind: 6Therefore, behold, the days come, saith the Lord, that this place shall no more be called Tophet, nor The valley of the son of Hinnom, but The valley of slaughter. 7And I will make void the counsel of Judah and Jerusalem in this place; and I will cause them to fall by the sword before their enemies, and by the hands of them that seek their lives: and their carcases will I give to be meat for the fowls of the heaven, and for the beasts of the earth. 8And I will make this city desolate, and an hissing; every one that passeth thereby shall be astonished and hiss because of all the plagues thereof. 9And I will cause them to eat the flesh of their sons and the flesh of their daughters, and they shall eat every one the flesh of his friend in the siege and straitness, wherewith their enemies, and they that seek their lives, shall straiten them. 10Then shalt thou break the bottle in the sight of the men that go with thee, 11And shalt say unto them, Thus saith the Lord of hosts; Even so will I break this people and this city, as one breaketh a potter's vessel, that cannot be made whole again: and they shall bury them in Tophet, till there be no place to bury. 12Thus will I do unto this place, saith the Lord, and to the inhabitants thereof, and even make this city as Tophet: 13And the houses of Jerusalem, and the houses of the kings of Judah, shall be defiled as the place of Tophet, because of all the houses upon whose roofs they have burned incense unto all the host of heaven, and have poured out drink offerings unto other gods. 14Then came Jeremiah from Tophet, whither the Lord had sent him to prophesy; and he stood in the court of the Lord's house; and said to all the people, (Jeremiah 19:2‑14)).

Strong’s Dictionary of Hebrew Words:

Number:
2011 (find all occurrences in KJV Bible)
Transliteration:
Hinnom
Phonic:
hin-nome’
Meaning:
probably of foreign origin; Hinnom, apparently a Jebusite
KJV Usage:
Hinnom

Jackson’s Dictionary of Scripture Proper Names:

to make self drowsy: behold them

Potts’ Bible Proper Names:

Sorrow; lamentation; full of goodness:―a narrow valley S. and W. of Jerusalem, Josh. 15:8. {Lamentatio}