/ Dictionary / Index U upside-down cake: Meaning and Definition of Find definitions for: up'side-down' cake" Pronunciation: [key] a cake that is baked on a layer of fruit, then turned before serving so that the fruit is on top. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. upside down upsilon Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language