chimneypiece \ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷\noun 1.obsolete: a picture or piece of tapestry hung as an ornament over a fireplace 2. a.: an ornamental construction above and around a fireplace opening embracing the mantel and the ornament or casing of the chimney breast b.: mantel 2