Noah Webster's Dictionary (a.) Astonishing; wonderful; amazing; especially, astonishing in magnitude or elevation; as, a stupendous mount.

Multi-Version Concordance Stupendous (1 Occurrence) 2 Corinthians 12:7 And judging by the stupendous grandeur of the revelations--therefore lest I should be over-elated there has been sent to me, like the agony of impalement, Satan's angel dealing blow after blow, lest I should be over-elated. (WEY)