a. [ L. stupendus astonishing, p. future pass. of stupere to be astonished at. Cf. Stupid. ] Astonishing; wonderful; amazing; especially, astonishing in magnitude or elevation; as, a stupendous pile. “A stupendous sum.” Macaulay. [ 1913 Webster ]
All are but parts of one stupendous whole. Pope. [ 1913 Webster ]
-- Stu*pen"dous*ly, adv. -- Stu*pen"dous*ness, n. [ 1913 Webster ]