A rule requiring that before a person is interrogated about a crime he or she be informed of legal protections against self-incrimination and the right to counsel, a procedure called the Miranda warning or reading someone his or her rights; evidence obtained from questioning done without first reading the Miranda warning is inadmissible in court (except for impeachment purposes). Miranda v. Arizona.n. A 1966 U.S. Supreme Court case that held that the police must inform criminal suspects of th...