Source : Webster's Revised Unabridged Dictionary (1913)

Stalk \Stalk\, v. i. [imp. & p. p. {Stalked}; p. pr. & vb. n.
   {Stalking}.] [AS. st[ae]lcan, stealcian to go slowly; cf.
   stels high, elevated, Dan. stalke to stalk; probably akin to
   1st stalk.]
   1. To walk slowly and cautiously; to walk in a stealthy,
      noiseless manner; -- sometimes used with a reflexive
      pronoun. --Shak.

            Into the chamber he stalked him full still.
                                                  --Chaucer.

            [Bertran] stalks close behind her, like a witch's
            fiend, Pressing to be employed.       --Dryden.

   2. To walk behind something as a screen, for the purpose of
      approaching game; to proceed under clover.

            The king . . . crept under the shoulder of his led
            horse; . . . ``I must stalk,'' said he. --Bacon.

            One underneath his horse, to get a shoot doth stalk.
                                                  --Drayton.

   3. To walk with high and proud steps; usually implying the
      affectation of dignity, and indicating dislike. The word
      is used, however, especially by the poets, to express
      dignity of step.

            With manly mien he stalked along the ground.
                                                  --Dryden.

            Then stalking through the deep, He fords the ocean.
                                                  --Addison.

            I forbear myself from entering the lists in which he
            has long stalked alone and unchallenged. --Mericale.

Source : WordNet®

stalking
     n 1: a hunt for game carried on by stalking or waiting in ambush
          [syn: {stalk}, {still hunt}]
     2: the act of following prey stealthily [syn: {stalk}]

stalking
     adj : moving silently and deliberately; especially pursuing
           stealthily and persistently; "we watched the stalking
           tiger approach his prey"; "a stalking specter on the
           castle walls at midnight"