Definitions for "De-duplication"
the removal of duplicate data (e-mail, user files) by electronic means. A real money and time saver.
Identification and removal of duplicate entries in a database.
Controlled duplication which makes sure that no matter how many times a name and address is on a list, or how many lists contain that name and address, it will be mailed only once. De-duplication can also be called “merge/purge”.