The Collaborative International Dictionary of English v.0.48:

Lurk \Lurk\ (l[^u]rk), v. i. [imp. & p. p. Lurked (l[^u]rkt);
   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 hidden; to lie in wait.
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            Like wild beasts, lurking in loathsome den.
                                                  --Spenser.
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            Let us . . . lurk privily for the innocent. --Prov.
                                                  i. 11.
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   2. To keep out of sight.
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            The defendant lurks and wanders about in Berks.
                                                  --Blackstone.
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