A thin oblong piece of material, such as wood or slate, that is laid in overlapping rows to cover the roof or sides of a house or other building. Informal A small signboard, as one indicating a professional office: After passing the bar exam, she hung out her shingle. A woman's close-cropped haircut. To cover (a roof or building) with shingles. To cut (hair) short and close to the head. Beach gravel consisting of large smooth pebbles unmixed with finer material. A stretch of shore or beach covered with such gravel.