A man claiming or popularly believed to practice sorcery or witchcraft.
A man who practices witchcraft, esp. black magic; sorcerer.
Origin of warlock
From Old English wÇ£rloga, from wÇ£r (“promise") (from Proto-Indo-European *wÄ“r- (“true"); compare veritable) + loga (“liar"), from lÄ“ogan (> English lie); the ending in -ock is from Scottish & Northern English.