Adjective
1. 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"2. of momentous or ominous significance;
"such a portentous...monster raised all my curiosity"- Herman Melville"a prodigious vision"3. 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 Mozart's prodigious talents"