A supernatural being supposed to live in the sea or other waters; a water-demon, a kelpie. Formerly also (in Middle English): †a siren, a mermaid (obs…

A whale, a sea monster.

In the Bible versions reproducing draco of the Vulgate and δράκων of the Septuagint, where the Hebrew has (a) tannīn a great sea- or…

A fabulous marine monster.

A whale or sea monster: = whirlpool, n.2 compounds.

In Welsh mythology: an aquatic monster. Also: an otter or beaver identified as such a monster.

Originally: any of various ferocious sea creatures. In later use: a large cetacean, esp. the killer whale, Orcinus orca. Cf. orca, n. Now rare.

A fabulous marine animal of terrifying proportions and shape.

A fabulous water-snake or sea-serpent.

A mythical marine monster resembling a dragon.

A mythical sea monster of enormous size, said to have been seen at times off the coast of Norway.

= sea-serpent, n. 1b.

The Midgard serpent.

the (great) sea-serpent: a sea monster of serpentine form and great length, frequently reported to have been seen at sea.

A sea-serpent. Obsolete. rare.

A mythical monster supposed to reside in deep water.

A mythical crocodile or other sea animal, variously represented in Indian art; (in Indian contexts) the equivalent of Capricorn in the signs of the…

In Zulu mythology: a female water spirit, usually in the form of a snake or a woman, requiring sacrifice (often of human life) in return for her…

An African water monster supposed to live in the swamps of the Nile valley.

A water monster alleged to live in Okanagan Lake, British Columbia. Also in extended use.