- 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"

1. Astonishing; wonderful; amazing; especially, astonishing in magnitude or elevation; as, a stupendous pile. "A stupendous sum." Macaulay.

"All are but parts of one stupendous whole." -- Pope.

-- Stu*pen"dous*ly, adv. -- Stu*pen"dous*ness, n.