/ Dictionary / Index S subumbrella: Meaning and Definition of Find definitions for: sub•um•brel•la Pronunciation: (sub"um-brel'u), [key] — n. Zool. the concave undersurface of a coelenterate medusa, as a jellyfish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subulate suburb Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language