adjective
- not marked with or having a date
Examples
- The undated letter made it difficult to determine when it was written.
- She found an undated photograph in her grandmother’s attic.
- The museum displayed several undated artifacts from the ancient civilization.
- His undated journal entries were arranged by topic rather than chronology.
- The undated check could not be processed by the bank.
- Archaeologists discovered undated pottery shards at the excavation site.