Parricide (, killer of parents or another close relative) is defined as:
- The act of killing one's father (patricide), or less usually mother (matricide) or other close relative, but usually not children (infanticide).
- The act of killing a person (such as the ruler of one's country) who stands in a relationship resembling that of a father
- A person who commits such an act
- A related adjective ("parricide treason", "parricide brothers")