/ Dictionary / Index S sponge cake: Meaning and Definition of Find definitions for: sponge' cake" Pronunciation: [key] a light, sweet cake made with a comparatively large proportion of eggs but no shortening. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sponge bath sponge cloth Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language