DictionaryvigilanteTaking the law into one's own hands
noun / adjective

vigilante

vij-uh-LAN-tee/ˌvɪdʒɪˈlænti/

A person who enforces the law or punishes perceived wrongdoing without legal authority.

A vigilante grips a suspected bicycle thief's wrist and blocks his escape.

An ordinary civilian takes justice into his own hands: beside a cut bicycle lock, he physically blocks a suspected bicycle thief and grips the man's wrist rather than letting him leave.
Etymology

Spanish vigilante meant “watchman.” In English it named members of vigilance committees that kept informal order where official authority was weak, connecting watchfulness with enforcement outside legal authority.

In context

The Wasteland Reviewer0:19
an internet vigilante played by writer director Franklin rich and Gareth this man creates an artificial intelligence Cherry played by Tatum Matthews who is used to catch Predators on the internet as she's staged as a young girl
The Artifice Girl (2023) - Wasteland Film Review

More examples

  • The vigilantes punish people they suspect of stealing.
  • Police warn that vigilante justice can harm innocent people.
  • She reports the crime instead of acting as a vigilante.

Forms

vigilante · vigilantes

vigilantism noun — Punishment of perceived wrongdoing without legal authority.

Similar words

avenger
Seeks revenge for a wrong rather than enforcing laws generally.
enforcer
Makes others obey rules, sometimes with legitimate authority.