1. not written down, documented, or officially noted
2. not captured on audio or video recording equipment

Examples

• Many folk songs from that era remain unrecorded.
• The meeting was unrecorded, so we have no official transcript.
• His early performances were unrecorded and exist only in memory.
• The conversation was unrecorded and off the record.
• Several unrecorded species may exist in the remote jungle.
• The band’s first concert was completely unrecorded.
• Much of the tribe’s history remains unrecorded.