Stupendous \Stu*pen"dous\, 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]