From Longman Business Dictionaryidentifieri‧den‧ti‧fi‧er /aɪˈdentəfaɪə-ər/ noun [countable]COMPUTING a group of letters, numbers, or symbols that a computer has been programmed to recognize and uses to process informationFor companies, Social Security numbers serve as a universal identifier that can help them link information about an individual from several separate databases.
