Definition of "warlock"

He was himself a warlock, or wizard, which they knew by his taking the witch's part.

1730, Edward Burt, Letters from a Gentleman in the North of Scotland

It was the day of warlocks and apparitions, now happily driven out by the zeal of the General Assembly.

1902, John Buchan, The Outgoing of the Tide

“Is it because she was a warlock?” she asked. “I know different kinds of magic . .” “No, that's not it, or at least . .” Mereth paused, collecting her thoughts, then explained, “The warlockry doesn't help, Lady Sarai, […]”

2015 February 25, Lawrence Watt-Evans, The Spell of the Black Dagger: A Legend of Ethshar, Wildside Press LLC, page 115

It seemed like a strange thing for her to risk on a student she barely knew—but then, she was a warlock. Simon had no idea what they were capable of, but he was getting better at imagining.

2015 March 17, Cassandra Clare, Robin Wasserman, The Lost Herondale, Simon and Schuster

Usually she blended in with the rest of the Academy faculty, making it easy to forget she was a warlock (at least, if you overlooked the blue skin). But he'd noticed that whenever another Downworlder was on campus, Catarina went out […]

2015 July 21, Cassandra Clare, Robin Wasserman, Pale Kings and Princes, Simon and Schuster

“We're also looking for a couple of warlocks,” Magnus said. “A Korean woman and a green fellow with horns.” “Oh,” said Fang with a distinct change of mood. “Them.” “You've seen them?” Alec said, trying not to sound too eager.

2020 September 1, Cassandra Clare, Wesley Chu, The Lost Book of the White, Simon and Schuster