Le*vi"a*than (?), n. [Heb. livyathan.]
1.
An aquatic animal, described in the book of Job, ch. xli., and mentioned on other passages of Scripture.
⇒ It is not certainly known what animal is intended, whether the crocodile, the whale, or some sort of serpent.
2.
The whale, or a great whale.
Milton.
© Webster 1913.