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.

Definitions of leviathan
  1. noun
    the largest or most massive thing of its kind
    “it was a leviathan among redwoods”
    “they were assigned the leviathan of textbooks”
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    type of:
    freak, lusus naturae, monster, monstrosity
    a person or animal that is markedly unusual or deformed
  2. noun
    monstrous sea creature symbolizing evil in the Old Testament
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    type of:
    mythical creature, mythical monster
    a monster renowned in folklore and myth
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