mapful noun2 •A quantity (of something) described by a map.Discover the mapful of fun that's around you anywhere you live (and drive). — 1957 •A quantity (of something) that forms a map or a map-like image.When he smiled, which he was doing as he came around the corner into the living room, you could see a mapful of lines and creases and a good set of teeth with one gold one on the left. — 1965 formsmapfuls