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time stamp

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noun
  1. a device for stamping the date and time of day that letters, packages, etc., are received or mailed.

Origin of time stamp

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for time-stamp

time-stamp

verb (tr)
  1. to assign an accurate time to (a message, transaction, etc)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012