(Paint.) 1. A color ground with water and gum or other glutinous medium; a color the vehicle of which is water; -- so called in distinction from oil color. [ 1913 Webster ]

☞ It preserves its consistency when dried in a solid cake, which is used by rubbing off a portion on a moistened palette. Moist water colors are water colors kept in a semifluid or pasty state in little metal tubes or pans. [ 1913 Webster ]

2. A picture painted with such colors. [ 1913 Webster ]