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Meaning of date stamp

date' stamp"

Pronunciation: [key]
  1. a device for stamping dates and frequently the place of origin or receipt, as on postal matter.
  2. the information stamped by this device.

date-stamp

Pronunciation: (dāt'stamp"), [key]
— v.t.
  1. to stamp the date on, as with a date stamp: He date-stamped every letter received.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.