A small amount of a soft or sticky substance spread on a surface. There was a daub of paint on the wall where the artist had tested the color.
A crude or amateurish painting or picture. The gallery was filled with masterpieces, but there was one daub that stood out for its lack of skill.
A mixture of clay, mud, straw, or similar materials used as a rough plaster, especially in wattle-and-daub construction. The medieval cottage walls were patched with fresh daub to keep out the damp.