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instant message

[in-stuh nt mes-ij]Digital Technology
noun
  1. an electronic message sent in real time via the Internet and therefore immediately available for display on the recipient's screen.Compare text message.
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verb (used without object)
  1. to send such an electronic message. Abbreviation:IMCompare text(def 16).
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for instant message

instant message

noun
  1. a message sent using instant-messaging technology
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verb instant-message
  1. to send an instant message (to)
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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