Edging

Part of speech: noun (n.)

1. That which forms an edge or border, as the fringe, trimming, etc., of a garment, or a border in a garden. Dryden.

2. The operation of shaping or dressing the edge of anything, as of a piece of metal. Edging machine, a machine tool with a revolving cutter, for dressing edges, as of boards, or metal plates, to a pattern or templet.