One who kills a king; a regicide.
1607. Shaks., Timon, IV. iii. 382. O thou sweete King-killer, and deare diuorce Twixt naturall Sunne and sire.
1681. T. Flatman, Heraclitus Ridens, No. 24 (1713), I. 158. They’ll give you leave to roast them at Temple-Bar with their Brother King-killer the Pope.
1726. De Foe, Hist. Devil (1822), 244. No less than a King-Killer and an assassinator.
