n One of the simple machines; a piece of material, such as metal or wood, thick at one edge and tapered to a thin edge at the other for insertion in a narrow crevice, used for splitting, tightening, securing, or levering (w:Wedge (mechanical device)|Wikipedia article).
n A piece (of food etc.) having this shape.
n (archaic) A flank of cavalry acting to split some portion of an opposing army, charging in an inverted V formation.
n (golf) A type of iron club used for short, high trajectories.
n A group of goose | geese or swans when they are in flight in a V formation.
n (context|colloquial|British) A quantity of money.