n 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.
n A rectangular piece of steel obtained by means of a shingling process involving hammering of puddled steel.
n A small signboard designating a professional office; this may be both a physical signboard or a metaphoric term for a small production company (a production shingle).
v (transitive|industry) To hammer and squeeze material in order to expel cinder and impurities from it, as in metallurgy.