/ Dictionary / Index S subterrestrial: Meaning and Definition of Find definitions for: sub•ter•res•tri•al Pronunciation: (sub"tu-res'trē-ul), [key] — adj. underground; subterranean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subterranean subtext Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language