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.
All are but parts of one stupendous whole. Pope.
— Stu‐pen″dous‐ly, adv. — Stu‐pen″dous‐ness, n.