What does "renegade" mean?

Renegade: One faithless to principle or party. Specifically: (a) An apostate from Christianity or from any form of religious faith. James justly regarded these renegades as the most serviceable tools that he could employ. Macaulay. (b) One who deserts from a military or naval post; a deserter. Arbuthnot. (c) A common vagabond; a worthless or wicked fellow.