duplicatedetection

noun
UK /ˈdjuːplɪkeɪt dɪˈtekʃən/
US /ˈduːplɪkeɪt dɪˈtekʃən/

Finding things that are exactly the same as other things.

The computer uses duplicate detection to remove the same photos from the folder.


OTHER MEANINGS

2. A software feature that warns you when you try to save information that already exists.

Duplicate detection stopped me from adding the same contact twice.

3. The process of comparing records to find identical entries in a database.

Duplicate detection helped the library merge two copies of the same book record.

4. A security step that flags repeated messages or transactions.

The bank's duplicate detection blocked the payment because it looked like one already made.