The Collaborative International Dictionary of English v.0.48:

Neighbor \Neigh"bor\, v. i.
   To dwell in the vicinity; to be a neighbor, or in the
   neighborhood; to be near. [Obs.]
   [1913 Webster]

         A copse that neighbors by.               --Shak.
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The Collaborative International Dictionary of English v.0.48:

Neighbor \Neigh"bor\ (n[=a]"b[~e]r), n. [OE. neighebour, AS.
   ne['a]hgeb[=u]r; ne['a]h nigh + geb[=u]r a dweller, farmer;
   akin to D. nabuur, G. nachbar, OHG. n[=a]hgib[=u]r. See
   Nigh, and Boor.] [Spelt also neighbour.]
   1. A person who lives near another; one whose abode is not
      far off. --Chaucer.
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            Masters, my good friends, mine honest neighbors.
                                                  --Shak.
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   2. One who is near in sympathy or confidence.
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            Buckingham
            No more shall be the neighbor to my counsel. --Shak.
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   3. One entitled to, or exhibiting, neighborly kindness;
      hence, one of the human race; a fellow being.
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            Which now of these three, thinkest thou, was
            neighbor unto him that fell among the thieves?
                                                  --Luke x. 36.
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            The gospel allows no such term as "stranger;" makes
            every man my neighbor.                --South.
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The Collaborative International Dictionary of English v.0.48:

Neighbor \Neigh"bor\, a.
   Near to another; adjoining; adjacent; next; neighboring. "The
   neighbor cities." --Jer. l. 40. "The neighbor room." --Shak.
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The Collaborative International Dictionary of English v.0.48:

neighbor \neigh"bor\, v. t. [imp. & p. p. Neighbored; p. pr. &
   vb. n Neighboring.]
   1. To adjoin; to border on; to be near to.
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            Leisurely ascending hills that neighbor the shore.
                                                  --Sandys.
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   2. To associate intimately with. [Obs.] --Shak.
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WordNet (r) 3.0 (2006):

neighbor
    n 1: a person who lives (or is located) near another [syn:
         neighbor, neighbour]
    2: a nearby object of the same kind; "Fort Worth is a neighbor
       of Dallas"; "what is the closest neighbor to the Earth?"
       [syn: neighbor, neighbour]
    v 1: live or be located as a neighbor; "the neighboring house"
         [syn: neighbor, neighbour]
    2: be located near or adjacent to; "Pakistan neighbors India"
       [syn: neighbor, neighbour]

The Devil's Dictionary (1881-1906):

NEIGHBOR, n.  One whom we are commanded to love as ourselves, and who
does all he knows how to make us disobedient.