1. Very great in size, extent, number, or degree. 2.Archaic Very wicked; heinous.
ETYMOLOGY:
From Latin normis, unusual, huge, monstrous : -, ex-, ex- + norma, norm; see gn- in Appendix I. Sense 2, from Middle English enormious, from Latin normis.
OTHER FORMS:
e·normous·ly —ADVERB e·normous·ness —NOUN
SYNONYMS:
enormous, immense, huge, gigantic, colossal, mammoth, tremendous, stupendous, gargantuan, vast These adjectives describe what is extraordinarily large. Enormous suggests a marked excess beyond the norm in size, amount, or degree: an enormous boulder.Immense refers to boundless or immeasurable size or extent: immense pleasure.Huge especially implies greatness of size or capacity: a huge success.Gigantic refers to size likened to that of a giant: a gigantic redwood tree.Colossal suggests a hugeness that elicits awe or taxes belief: a colossal ancient temple.Mammoth is applied to something of unwieldy hugeness: “mammoth stone figures in . . . buckled eighteenth-century pumps, the very soles of which seem mountainously tall” (Cynthia Ozick, The Best American Essays 1994 - Rushdie in the Louvre 1994.) Tremendous suggests awe-inspiring or fearsome size: ate a tremendous meal.Stupendous implies size that astounds or defies description: “The whole thing was a stupendous, incomprehensible farce” (W. Somerset Maugham). Gargantuan especially stresses greatness of capacity, as for food or pleasure: a gargantuan appetite.Vast refers to greatness of extent, size, area, or scope: “Of creatures, how few vast as the whale” (Herman Melville).
-nôr
m
s
normis, unusual, huge, monstrous : 
- in Appendix I. Sense 2, from Middle English enormious, from Latin 
