Home › Words › U › unarrestunarrestunarrest · noun — the act of cancelling an arrest.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom un- + arrest.nounThe act of cancelling an arrest.e.g.“However, it has been suggested to the Committee that police will not utilise this power because there will be a fear of the "unarrest" being used as evidence of a wrongful arrest.” — 1994, Queensland. Parliament. Legislative Assembly, Parliamentary Papers - Volume 3, page 223:verbTo release (an arrested person) from custody.Definitions & examples from Wiktionary (CC BY-SA 3.0).