Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

            But could instead, and ever-during dark Surrounds
            me.                                   --Milton.

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

   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.

   Syn: To encompass; encircle; environ; invest; hem in; fence
        about.

Surround \Sur*round"\, n.
   A method of hunting some animals, as the buffalo, by
   surrounding a herd, and driving them over a precipice, into a
   ravine, etc. [U.S.] --Baird.

Source : WordNet®

surround
     n : the area in which something exists or lives; "the
         country--the flat agricultural surround" [syn: {environment},
          {environs}, {surroundings}]
     v 1: be around; "Developments surround the town"; "The river
          encircles the village" [syn: {environ}, {encircle}, {circle},
           {round}, {ring}]
     2: extend on all sides of simultaneously; encircle; "The forest
        surrounds my property" [syn: {skirt}, {border}]
     3: envelop completely; "smother the meat in gravy" [syn: {smother}]
     4: surround so as to force to give up; "The Turks besieged
        Vienna" [syn: {besiege}, {beleaguer}, {hem in}, {circumvent}]
     5: surround with a wall in order to fortify [syn: {wall}, {palisade},
         {fence}, {fence in}]