Miranda v. Arizona (1966)

Definition from Nolo’s Plain-English Law Dictionary

A U.S. Supreme Court case in which the Court established the rights of a criminal suspect who has been arrested or is otherwise not free to leave. These rights are the right to remain silent, the right to have a lawyer present during questioning, the right to a court-appointed attorney if the suspect cannot afford one, and the warning that anything the suspect says can be used in court. To use a confession or admission in court, the prosecution must prove the suspect knowingly waived those rights, and thus the rights should be read or recited to the suspect. These became known as the Miranda rights or Miranda warnings.

Definition provided by Nolo’s Plain-English Law Dictionary.