/ Dictionary / Index U umbrella tree: Meaning and Definition of Find definitions for: umbrel'la tree" Pronunciation: [key] an American magnolia, Magnolia tripetala, having large leaves in umbrellalike clusters. any of various other trees resembling an umbrella. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. umbrella tent umbrette Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language