/ Dictionary / Index G gouache: Meaning and Definition of Find definitions for: gouache Pronunciation: (gwäsh, g-äsh' Fr. gwash), [key] — pl. gouach•es a technique of painting with opaque watercolors prepared with gum. an opaque color used in painting a gouache. a work painted using gouache. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gouache (Thesaurus) Götz Gouda 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