A decorative strip around the edge of something, such as fabric.
A strip of ground, as at the edge of a garden or walk, in which ornamental plants or shrubs are planted.
The line or frontier area separating political divisions or geographic regions; a boundary.
v.
bor·dered, bor·der·ing, bor·ders
v.
tr.
To put a border on.
To lie along or adjacent to the border of: Canada borders the United States.
v.
intr.
To lie adjacent to another: The United States borders on Canada.
To be almost like another in character: an act that borders on heroism.
[Middle English bordure, from Old French bordeure, from border, to border, from bort, border, of Germanic origin.] bor'der·er n.
Synonyms: These nouns refer to the line or narrow area that marks the outside limit of something such as a surface. Border refers either to the boundary line (a fence along the border of the property) or to the area immediately inside (a frame with a wide border). Margin is a border of more or less precisely definable width: the margin of the page. Edge refers to the bounding line formed by the continuous convergence of two surfaces: sat on the edge of the chair. Verge is an extreme terminating line or edge: the sun's afterglow on the verge of the horizon. Figuratively it indicates a point at which something is likely to begin or to happen: an explorer on the verge of a great discovery. Brink denotes the edge of a steep place: stood on the brink of the cliff. In an extended sense it indicates the likelihood or imminence of a sudden change: on the brink of falling in love. Rim most often denotes the edge of something circular or curved: a crack in the rim of the lens. Brim applies to the upper edge or inner side of the rim of something shaped like a basin: lava issuing from the brim of the crater.
[bawr-der-er] 
dər