Encyclopedia entry

Leviathan

A transliterated Hebrew word (livyathan), meaning “twisted,” “coiled.” In Job 3:8, Revised Version, and marg. of Authorized Version, it denotes the dragon which, according to Eastern tradition, is an enemy of light; in 41:1 the crocodile is meant; in Ps. 104:26 it “denotes any large animal that moves by writhing or wriggling the body, the whale, the monsters of the deep.” This word is also used figuratively for a cruel enemy, as some think “the Egyptian host, crushed by the divine power, and cast on the shores of the Red Sea” (Ps. 74:14). As used in Isa. 27:1, “leviathan the piercing [R.V. ‘swift’] serpent, even leviathan that crooked [R.V. marg. ‘winding’] serpent,” the word may probably denote the two empires, the Assyrian and the Babylonian.

Also from Smith's (1884) +

(jointed monster) occurs five times in the text of the Authorized Version, and once in the margin of (Job 3:8) where the text has “mourning.” In the Hebrew Bible the word livyathan, which is, with the foregoing exception, always left untranslated in the Authorized Version, is found only in the following passages: (Job 3:8; 41:1; Psalms 74:14; 104:26; Isaiah 27:1) In the margin of (Job 3:8) and text of (Job 41:1) the crocodile is most clearly the animal denoted by the Hebrew word. (Psalms 74:14) also clearly points to this same saurian. The context of (Psalms 104:26) seems to show that in this passage the name represents some animal of the whale tribe, which is common in the Mediterranean; but it is somewhat uncertain what animal is denoted in (Isaiah 27:1) As the term leviathan is evidently used in no limited sense, it is not improbable that the “leviathan the piercing serpent,” or “leviathan the crooked serpent,” may denote some species of the great rock-snakes which are common in south and west Africa.

In the Bible

Verses where Leviathan is named. Berean Standard Bible (public domain).

Isaiah 27:1
In that day the LORD will take His sharp, great, and mighty sword, and bring judgment on Leviathan the fleeing serpent —Leviathan the coiling serpent—and He will slay the dragon of the sea.
Job 3:8
May it be cursed by those who curse the day — those prepared to rouse Leviathan.
Job 41:1
“Can you pull in Leviathan with a hook or tie down his tongue with a rope?
Job 41:10
No one is so fierce as to rouse Leviathan. Then who is able to stand against Me?
Job 41:25
When Leviathan rises up, the mighty are terrified; they withdraw before his thrashing.
Psalms 74:14
You crushed the heads of Leviathan; You fed him to the creatures of the desert.

+1 more verse naming Leviathan.

Scripture on Leviathan

Leviathan references

Voices on Leviathan

Surfaced by name match — accuracy varies by title clarity.

Dear Christian, they're still here... (Leviathan, Behemoth Explained)