instant messaging

US /ˈɪn.stənt ˈmes.ɪ.dʒɪŋ/
UK /ˈɪn.stənt ˈmes.ɪ.dʒɪŋ/
"instant messaging" picture
1.

a type of online chat which offers real-time text transmission over the Internet

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We use instant messaging for quick updates at work.
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Many people prefer instant messaging over email for casual conversations.
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IMchattexting
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instant messageinstantmessagemessaginginstant replaymessage boardtext messaging