The Collaborative International Dictionary of English v.0.48:

Border \Bor"der\, v. t.
   1. To make a border for; to furnish with a border, as for
      ornament; as, to border a garment or a garden.
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   2. To be, or to have, contiguous to; to touch, or be touched,
      as by a border; to be, or to have, near the limits or
      boundary; as, the region borders a forest, or is bordered
      on the north by a forest.
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            The country is bordered by a broad tract called the
            "hot region."                         --Prescott.
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            Shebah and Raamah . . . border the sea called the
            Persian gulf.                         --Sir W.
                                                  Raleigh.
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   3. To confine within bounds; to limit. [Obs.]
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            That nature, which contemns its origin,
            Can not be bordered certain in itself. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Border \Bor"der\, n. [OE. bordure, F. bordure, fr. border to
   border, fr. bord a border; of German origin; cf. MHG. borte
   border, trimming, G. borte trimming, ribbon; akin to E. board
   in sense 8. See Board, n., and cf. Bordure.]
   1. The outer part or edge of anything, as of a garment, a
      garden, etc.; margin; verge; brink.
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            Upon the borders of these solitudes.  --Bentham.
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            In the borders of death.              --Barrow.
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   2. A boundary; a frontier of a state or of the settled part
      of a country; a frontier district.
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   3. A strip or stripe arranged along or near the edge of
      something, as an ornament or finish.
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   4. A narrow flower bed.
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   Border land, land on the frontiers of two adjoining
      countries; debatable land; -- often used figuratively; as,
      the border land of science.

   The Border, The Borders, specifically, the frontier
      districts of Scotland and England which lie adjacent.

   Over the border, across the boundary line or frontier.
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   Syn: Edge; verge; brink; margin; brim; rim; boundary;
        confine.
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The Collaborative International Dictionary of English v.0.48:

Border \Bor"der\, v. i. [imp. & p. p. Bordered; p. pr. & vb.
   n. Bordering.]
   1. To touch at the edge or boundary; to be contiguous or
      adjacent; -- with on or upon as, Connecticut borders on
      Massachusetts.
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   2. To approach; to come near to; to verge.
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            Wit which borders upon profaneness deserves to be
            branded as folly.                     --Abp.
                                                  Tillotson.
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WordNet (r) 3.0 (2006):

border
    n 1: a line that indicates a boundary [syn: boundary line,
         border, borderline, delimitation, mete]
    2: the boundary line or the area immediately inside the boundary
       [syn: margin, border, perimeter]
    3: the boundary of a surface [syn: edge, border]
    4: a decorative recessed or relieved surface on an edge [syn:
       molding, moulding, border]
    5: a strip forming the outer edge of something; "the rug had a
       wide blue border"
    v 1: extend on all sides of simultaneously; encircle; "The
         forest surrounds my property" [syn: surround, environ,
         ring, skirt, border]
    2: form the boundary of; be contiguous to [syn: bound,
       border]
    3: enclose in or as if in a frame; "frame a picture" [syn:
       frame, frame in, border]
    4: provide with a border or edge; "edge the tablecloth with
       embroidery" [syn: border, edge]
    5: lie adjacent to another or share a boundary; "Canada adjoins
       the U.S."; "England marches with Scotland" [syn: border,
       adjoin, edge, abut, march, butt, butt against,
       butt on]