without official permission No access for unauthorized personnel. opposite authorize unauthorized use of public funds an unauthorized biography (= written without the subject’s permission or help)Extra examples Failure to complete the form will result in absences being regarded as unauthorized. Schools completed a questionnaire on attendance and unauthorized absence. There are special precautions to prevent unauthorized personnel from gaining access. There was a ban on all unauthorized marches. They violated international law by making unauthorized broadcasts to the mainland. Unauthorized access is a criminal offence under the Computer Misuse Act.