/ Dictionary / Index S souterrain: Meaning and Definition of Find definitions for: sou•ter•rain Pronunciation: (s"tu-rān', s'tu-rān"), [key] — n. Chiefly Archaeol. a subterranean passage or structure; grotto. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. souter south Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language