From Longman Dictionary of Contemporary Englishgouachegou‧ache /ɡʊˈɑːʃ, ɡwɑːʃ/ noun 1 [uncountable]AVP a method of painting using colours that are mixed with water and made thicker with a type of glue2 [countable]AVP a picture painted in this way
Examples from the Corpus
gouache• They represent a wide range of water-based media, from gouache and acrylic to transparent watercolors.• However, gouache is not a substitute for watercolour, and is a water-based medium in its own right.• Her medium is gouache and watercolour which lends itself well to graphic reproduction.• Colours used are the Art Spectrum and Winsor & Newton gouache.• Thick gouache can give similar results to oil paint, except that the gouache often dries with a matt surface.• When watercolour is combined with gouache, or with the new water-soluble drawing media, the results can be quite striking.• He explains how he captures the grandeur of his subject with gouache.• With gouache the paint dries quite quickly.Origin gouache (1800-1900) French Italian guazzo “small pool”, from Latin aquatio “act of bringing water” 