1. A small thin piece of building material often with one end thicker than the other for laying in overlapping rows as a covering for the roof or sides of a building or structure. 2. A small unit of prepared roofing material designed to be installed with similar units in overlapping rows on inclines normally exceeding 25 degrees. 3. To cover with shingles. 4. To apply any sheet material in overlapping rows like shingles.