A sharpener is a tool for sharpening. It may refer to: Knife sharpener, a tool for sharpening a knife Sharpening steel, a tool for aligning the edge of a knife, usually a kitchen knife Sharpening stone, a tool for sharpening a bladed or edged tool, such a knife Pencil sharpener, a tool for sharpening a pencil Sharpening jig, a tool for sharpening a woodworking tool
See also Knifegrinder, a trade or occupation