WARLOCK Meaning of WARLOCK in English ■ noun a man who practises witchcraft.OriginOE wrloga 'traitor, scoundrel, monster', also 'the Devil', from wr 'covenant' + an element related to lēogan 'belie, deny'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004