parricide

The killing of one’s father, mother, or other near relative.

The killing of the ruler of one’s country.

One who commits parricide.

One who murders his father or mother.

One who murders any ancestor or any one to whom he owes reverence; also, in old use, one who kills his child.

The murder of a parent or of one to whom reverence is due.

Figuratively, the crime of treason against one’s country.

Figuratively, one who commits treason against his country.

Properly, one who murders one’s own father; in a wider sense, one who murders one’s father or mother or any ancestor.

The act or crime of murdering one’s own father or any ancestor.