Warrant/ˈwɔːrənt/ Definition 1 of 4Pro Tip 1/3Legal Authority Warrant means an official has been granted the right to take action. A judge issued a warrant for the suspect's arrest. Pro Tip 2/3Police Usage Police often require warrants to search or arrest, ensuring privacy rights. Without a warrant, the police couldn't enter the premises. Pro Tip 3/3Procedure Specific The type of warrant indicates the specific legal procedure allowed. She acquired a search warrant based on probable cause.