leviathan UK /lɪˈvaɪəθn̩/US /ləˈvaɪəθ(ə)n/noun 4adjective 1forms 2 noun4 •A vast sea monster of tremendous strength, either imaginary or real, described as the most dangerous and powerful creature in the ocean.The fomie vvaues out of the dreadfull deep, / The huge Leuiathan, dame Natures vvonder, / Making his sport, that manie makes to vveep: […] — 1591 •(figurative) A thing which is monstrously great in size, strength, etc. (especially a ship); also, a person with great power or wealth.Of this last request, the Lacquy of this great Leuiathan, promisde he should be maister, but he vvould not bring him to a miles end by land, (they vvere too many to meddle vvith). — 1606 •(figurative) Sometimes in the form Leviathan: based on the writings of Thomas Hobbes, the political state, especially a domineering and totalitarian one.The fact is that [Thomas] Hobbes is interested in neither, but concerned exclusively with the political structure itself, and he depicts the features of man according to the needs of the Leviathan. — 1951 •(figurative, no longer used) Synonym of Satan (“the supreme evil spirit in the Abrahamic religions, who tempts humanity into sin; the Devil”). adjective1 •Very large; enormous, gargantuan.Her virtuous, pale-blue, saucerlike eyes flooded with leviathan tears on unexpected occasions and made Yossarian mad. — 1961 formsLeviathans · leviathans