The Collaborative International Dictionary of English v.0.48:

Warlock \War"lock\, n. [OE. warloghe a deceiver, a name or the
   Devil, AS. w?rloga a belier or breaker of his agreement,
   word, or pledge; w?r covenant, troth (aki? to L. verus true;
   see Very) + loga a liar (in comp.), le['o]gan to lie. See
   3d Lie.]
   A male witch; a wizard; a sprite; an imp. [Written also
   warluck.] --Dryden.
   [1913 Webster]

         It was Eyvind Kallda's crew
         Of warlocks blue,
         With their caps of darkness hooded!      --Longfellow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Warlock \War"lock\, a.
   Of or pertaining to a warlock or warlock; impish. [R.]
   [1913 Webster]

         Thou shalt win the warlock fight.        --J. R. Drak?.
   [1913 Webster]

WordNet (r) 3.0 (2006):

warlock
    n 1: a male witch or demon

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "warlock":
   Comus, Faust, charmer, conjurer, diabolist, diviner, dowser,
   enchanter, mage, magus, miracle-worker, necromancer, sorcerer,
   thaumaturge, thaumaturgist, theurgist, voodooist, water witch,
   wizard