A vigilante (/ˌvɪdʒɪˈlænti/, /ˌvɪdʒɪˈlænteɪ/; Spanish: [bixiˈlante]; Portuguese: [viʒiˈlɐ̃t(ɨ)], [viʒiˈlɐ̃tʃi]) is a civilian or organization acting in a law enforcement capacity (or in the pursuit of self-perceived justice) without legal authority.
"Vigilante justice" is often rationalized by the concept that proper legal forms of criminal punishment are either nonexistent, insufficient, or inefficient. Vigilantes normally see the government as ineffective in enforcing the law; such individuals often claim to justify their actions as a fulfillment of the wishes of the community.
Persons alleged to be escaping the law or above the law are sometimes the victims of vigilantism.
Vigilante conduct involves certain degrees of violence. Vigilantes could assault targets verbally and/or physically, damage and/or vandalize property, or even kill individuals.
In a number of cases, vigilantism has involved targets with mistaken identities.