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Definition of instant message noun from the Oxford Advanced Learner's Dictionary

instant message

noun
 
/ˌɪnstənt ˈmesɪdʒ/
 
/ˌɪnstənt ˈmesɪdʒ/
(also IM)
[countable, uncountable]
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  1. a written message sent using a system on the internet that allows people to communicate with each other very quickly
    • to send an instant message
    • Word spreads by email and instant message.
    Topics Phones, email and the internetb2
previously
adverb
 
 
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