Wiktionary
altitudinous
a. (lb en humorous) lofty; very high.
WordNet
altitudinous
adj. indefinitely high; lofty
Usage examples of "altitudinous".
I tried to add up how high that price had been, considering the altitudinous cost-of-living index of Bermuda.
Force of numbers as much as conscious decision urged it from its altitudinous fastnesses to begin this migration of irresistible scale.