n. pl. war·locks
A person, especially a man, claiming or popularly believed to practice sorcery or witchcraft.
[From Scots warlock (generalized in English from literary use by Scottish authors and replacing Early Modern English warlow), from alteration (with -ok for Middle English -ow as in Scots elbok, elbow, and windok, window) of Middle English warloghe, warlow, from Old English wǣrloga, oath-breaker : wǣr, pledge; see wērə-o- in the Appendix of Indo-European roots + -loga, liar (from lēogan, to lie; see leugh- in the Appendix of Indo-European roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.