adjacency

from WordNet (r) 3.0 (2006)

adjacency
    n 1: the attribute of being so near as to be touching [syn:
         {adjacency}, {contiguity}, {contiguousness}]

from The Collaborative International Dictionary of English v.0.48

Adjacence \Ad"ja"cence\, Adjacency \Ad*ja"cen*cy\, [Cf. LL.
   adjacentia.]
   1. The state or attribute of being adjacent or contiguous;
      contiguity; the attribute of being so near as to be
      touching; as, the adjacency of lands or buildings.

   Syn: contiguousness
        [1913 Webster]

   2. That which is adjacent. [R.] --Sir T. Browne.
      [1913 Webster]

from The Free On-line Dictionary of Computing (8 July 2008)

adjacency
adjacent

   <networking> A relationship between two {network} devices,
   e.g. {routers}, which are connected by one media segment so
   that a packet sent by one can reach the other without going
   through another network device.  The concept of adjacency is
   important in the exchange of routing information.

   Adjacent {SNA} {nodes} are nodes connected to a given node
   with no intervening nodes.  In {DECnet} and {OSI}, adjacent
   nodes share a common segment ({Ethernet}, {FDDI}, {Token
   Ring}).

   (1998-03-10)