The Collaborative International Dictionary of English v.0.48:

Surrounding \Sur*round"ing\, a.
   Inclosing; encircling.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Surrounding \Sur*round"ing\, n.
   1. An encompassing.
      [1913 Webster]

   2. pl. The things which surround or environ; external or
      attending circumstances or conditions.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Surround \Sur*round"\, v. t. [imp. & p. p. Surrounded; p. pr.
   & vb. n. Surrounding.] [OF. suronder to overflow, LL.
   superundare; fr. L. super over + undare to rise in waves,
   overflow, fr. unda wave. The English sense is due to the
   influence of E. round. See Super-, and Undulate, and cf.
   Abound.]
   1. To inclose on all sides; to encompass; to environ.
      [1913 Webster]

   2. To lie or be on all sides of; to encircle; as, a wall
      surrounds the city.
      [1913 Webster]

            But could instead, and ever-during dark
            Surrounds me.                         --Milton.
      [1913 Webster]

   3. To pass around; to travel about; to circumnavigate; as, to
      surround the world. [Obs.] --Fuller.
      [1913 Webster]

   4. (Mil.) To inclose, as a body of troops, between hostile
      forces, so as to cut off means of communication or
      retreat; to invest, as a city.
      [1913 Webster]

   Syn: To encompass; encircle; environ; invest; hem in; fence
        about.
        [1913 Webster]

WordNet (r) 3.0 (2006):

surrounding
    adj 1: closely encircling; "encompassing mountain ranges"; "the
           surrounding countryside" [syn: encompassing(a),
           surrounding(a), circumferent]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "surrounding":
   abutting, adjacent, adjoining, ambient, bordering, circling,
   circumambient, circumferential, circumflex, circumfluent,
   circumfluous, circumjacent, claustral, confining, contextual,
   embracing, encircling, enclosing, encompassing, enfolding,
   enveloping, environing, environmental, limiting, local, nearby,
   neighboring, parietal, peripheral, roundabout, suburban,
   wrapping