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time stamp

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