edging

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Something that forms or serves as an edge or border.

from The Century Dictionary.

• noun In photography, a coat of albumen, gelatin, or india-rubber along the edges of a collodion-covered dry-plate; a protection to the film during development. Generally the whole surface of the plate is given a substratum for the collodion.
• noun That which is added on the border or which forms the edge, as lace, fringe, or braid added to a garment for ornament; specifically, narrow lace or embroidery especially made for trimming frills and parts of dress.
• noun A border; a skirting; specifically, in horticulture, a row of plants set along the border of a flower-bed: as, an edging of box.
• noun In bookbinding: The art of preparing the uncut or folded leaves of a book by shaving or trimming, adapting them to receive gold, marbling, or color, and burnishing.
• noun The decorating of the edges of a book by marbling or coloring.
• noun In carpentry, the evening of the edges of ribs and rafters to make them range together.

from the GNU version of the Collaborative International Dictionary of English.

• noun That which forms an edge or border, as the fringe, trimming, etc., of a garment, or a border in a garden.
• noun The operation of shaping or dressing the edge of anything, as of a piece of metal.
• noun a machine tool with a revolving cutter, for dressing edges, as of boards, or metal plates, to a pattern or templet.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Present participle of edge.
• noun Something that forms, defines or marks the edge.
• noun rock climbing Technique involving the placement of the edge of the climbing shoe on a sharp hold.
• noun The operation of shaping or dressing the edge of anything, as of a piece of metal.
• noun To ability to control or delay one's orgasm

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun border consisting of anything placed on the edge to finish something (such as a fringe on clothing or on a rug)