so great in size or force or extent as to elicit awe; colossal crumbling ruins of an ancient temple; has a colossal nerve; a prodigious storm; a stupendous field of grass; stupendous demand

[ Syn: colossal , stupendous ]

of momentous or ominous significance; such a portentous...monster raised all my curiosity- Herman Melville; a prodigious vision

[ Syn: portentous ]

far beyond what is usual in magnitude or degree; a night of exceeding darkness; an exceptional memory; olympian efforts to save the city from bankruptcy; the young Mozarts prodigious talents

[ Syn: exceeding , exceptional , olympian , surpassing ]