Rēg'i-cīde, n.
n. [Fr. régicide, It. & Sp. regicida, fr. Lat. rex, regis, a king, and cædere, to kill.] 1. A king-killer; one who murders a king; specifically (Eng. Hist.), one of the judges who condemned Charles I. to death.
Sense 2. The killing or murder of a king.