LEVIATHAN

n. sea monster (Biblical); extremely large animal (especially a whale); something which is extremely large (especially a ship)

Leviathan was a Biblical sea monster referred to in the Old Testament (Psalm 74:13-14; Job 41; Isaiah 27:1). The word leviathan has become synonymous with any large sea monster or creature. In the novel Moby-Dick it refers to great whales, and in Modern Hebrew, it means simply "whale".
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Noun
1. the largest or most massive thing of its kind; "it was a leviathan among redwoods"; "they were assigned the leviathan of textbooks"
(hypernym) freak, monster, monstrosity, lusus naturae
2. monstrous sea creature symbolizing evil in the Old Testament
(hypernym) mythical monster, mythical creature

n. leviathan, mythological sea monster

n. leviathan, sea monster (Biblical); extremely large animal (especially a whale); something which is extremely large (especially a ship)