what's a leviathan?
<answer> A leviathan is the or most massive thing of its kind or monstrous sea creature symbolizing evil in the Old Testament. <context> • LEVIATHAN (noun) The noun LEVIATHAN has 2 senses: 1. the largest or most massive thing of its kind. 2. monstrous sea creature symbolizing evil in the Old Testament. Familiarity information: LEVIATHAN used as a noun is rare.