Source : Webster's Revised Unabridged Dictionary (1913)

Lurk \Lurk\, v. i. [imp. & p. p. {Lurked}; p. pr. & vb. n.
   {Lurking}.] [OE. lurken, lorken, prob. a dim. from the source
   of E. lower to frown. See {Lower}, and cf. {Lurch}, a sudden
   roll, {Lurch} to lurk.]
   1. To lie hid; to lie in wait.

            Like wild beasts, lurking in loathsome den.
                                                  --Spenser.

            Let us . . . lurk privily for the innocent. --Prov.
                                                  i. 11.

   2. To keep out of sight.

            The defendant lurks and wanders about in Berks.
                                                  --Blackstone.

Source : WordNet®

lurk
     v 1: lie in wait, lie in ambush, behave in a sneaky and secretive
          manner [syn: {skulk}]
     2: be about; "The high school students like to loiter in the
        Central Square"; "Who is this man that is hanging around
        the department?" [syn: {loiter}, {lounge}, {footle}, {lollygag},
         {loaf}, {lallygag}, {hang around}, {mess about}, {tarry},
         {linger}, {mill about}, {mill around}]
     3: wait in hiding to attack [syn: {ambush}, {scupper}, {bushwhack},
         {waylay}, {ambuscade}, {lie in wait}]

Source : Free On-Line Dictionary of Computing

lurk
     
        {lurking}