leviathan
Americannoun
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Bible. Often Leviathan a sea monster.
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any huge marine animal, as the whale.
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anything of immense size and power, as a huge, oceangoing ship.
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Leviathan, a philosophical work (1651) by Thomas Hobbes dealing with the political organization of society.
noun
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Bible a monstrous beast, esp a sea monster
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any huge or powerful thing
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Figuratively, a “leviathan” is any enormous beast.
Leviathan is a work on politics by the seventeenth-century English author Thomas Hobbes.
Etymology
Origin of leviathan
First recorded in 1350–1400; Middle English levyathan, from Late Latin leviathan, ultimately from Hebrew liwyāthān
Explanation
A leviathan is a giant sea creature. It can be real, like a whale, or mythical. Moby Dick is an example of a famous leviathan. The word comes from Hebrew livyathan which means a great sea serpent or sea monster. A real leviathan is the giant sea squid Architeuthis, which was photographed alive for the first time in 2005. A leviathan can also be something that is really, really big. The Titanic was a leviathan that now rests with leviathans.
Vocabulary lists containing leviathan
Lord of the Flies
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Rap Lyrics
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Refugee
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Once the leviathan of profit for companies like Johnson & Johnson and Boston Scientific, pelvic mesh was now the white whale of liability for mass tort plaintiffs’ attorneys.
From Slate • Jan. 13, 2026
It expanded into a $1.8 trillion leviathan through a series of big-ticket mergers.
From The Wall Street Journal • Dec. 6, 2025
A stiff primary challenge from the liberal leviathan, Massachusetts Sen. Edward M. Kennedy.
From Los Angeles Times • Dec. 29, 2024
What an extraordinary signing the Japanese leviathan has been, what a goals haul, what joy he has sparked among the Celtic support.
From BBC • Apr. 8, 2023
It had moved in the midnight waters of space like a pale sea leviathan; it had passed the ancient moon and thrown itself onward into one nothingness following another.
From "The Martian Chronicles" by Ray Bradbury
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.