lynch

To punish (a person) without legal process or authority, especially by hanging, for a perceived offense or as an act of bigotry.

See linch.

To punish by lynch-law; punish summarily, for a crime or public offense of any kind, without authority of law; specifically, to punish with death in this manner. See lynch-law.

To inflict punishment upon, especially death, without the forms of law, as when a mob captures and hangs a suspected person. See lynch law.

To execute (somebody) without a proper legal trial or procedure, especially by hanging.

To commit an act of violence by a mob upon the body of another person.

kill without legal sanction