[syn: adjacent, conterminous, contiguous, neighboring(a)]
The Collaborative International Dictionary of English v.0.48:
Contiguous \Con*tig"u*ous\, a. [L. contiguus; akin to contigere
   to touch on all sides. See Contingent.]
   In actual contact; touching; also, adjacent; near;
   neighboring; adjoining.
   [1913 Webster]
         The two halves of the paper did not appear fully
         divided . . . but seemed contiguous at one of their
         angles.                                  --Sir I.
                                                  Newton.
   [1913 Webster]
         Sees no contiguous palace rear its head. --Goldsmith.
   [1913 Webster]
   Contiguous angles. See Adjacent angles, under Angle.
   Syn: Adjoining; adjacent. See Adjacent. --
        Con*tig"u*ous*ly, adv. -- Con*tig"u*ous*ness, n.
        [1913 Webster] Continence
WordNet (r) 3.0 (2006):
contiguous
    adj 1: very close or connected in space or time; "contiguous
           events"; "immediate contact"; "the immediate vicinity";
           "the immediate past" [syn: contiguous, immediate]
    2: connecting without a break; within a common boundary; "the 48
       conterminous states"; "the contiguous 48 states" [syn:
       conterminous, contiguous]
    3: having a common boundary or edge; abutting; touching; "Rhode
       Island has two bordering states; Massachusetts and
       Conncecticut"; "the side of Germany conterminous with
       France"; "Utah and the contiguous state of Idaho";
       "neighboring cities" [syn: adjacent, conterminous,
       contiguous, neighboring(a)]
Moby Thesaurus II by Grady Ward, 1.0:
25 Moby Thesaurus words for "contiguous":
   abutting, adjacent, adjoining, bordering, close, close-by,
   connecting, conterminous, coterminous, end to end, endways,
   endwise, face to face, immediate, joined, juxtaposed,
   juxtapositional, juxtapositive, near, nearby, neighbor,
   neighboring, next, nigh, touching