any cutting tool with a sharp cutting edge (as a chisel or knife or plane or gouge)

carve with a chisel

a chisel of tempered steel with a sharp point; used for engraving

narrow chisel made of steel; used to cut stone or bricks

a stonemason's chisel with a broad edge for dressing stone

a chisel with a thin blade for woodworking

a long chisel with a slightly bent cutting end; used for heavy prying or cleaning mortises