IM Definition in the Cambridge English Dictionary
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Definition of “IM” - English Dictionary

Definition of "IM" - American English Dictionary

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IMverb [T]

 us   /ɑɪˈem/ (IM's, present participle IM'ing, past tense IM'd) (also instant message)
to ​communicate with someone over the Internet using a ​program that ​sends and ​receives messages without ​delay: I ​finish my ​homework, take out the ​garbage, and then IM my ​friends.

I’m

 us   /ɑɪm/
contraction of I am: I’m ​sorry I’m late.
(Definition of IM from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "IM" - Business English Dictionary

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IMnoun [U]

uk   us  
COMMUNICATIONS, INTERNET abbreviation forinstantmessaging: a ​serviceavailable on the ​internet that ​allows you to ​exchange written ​messages very quickly with someone who is using the ​internet at the same ​time: Some ​businesses use IM for quick ​updates on ​projectstatus or ​meetingtimes.
COMMUNICATIONS, INTERNET abbreviation for instantmessage: a written ​message that can be ​sent over the ​internet to someone who is using the ​internet at the same ​time: Thanks to the ​internet, ​students say that if they get ​stuck on a math problem, ​help is only an IM away.
IT abbreviation for information management

IMverb [I or T]

uk   us  
COMMUNICATIONS, INTERNET abbreviation forinstantmessage: to use the ​internet to ​exchange written ​messages very quickly with someone who is using the ​internet at the same ​time: IM with sb By setting up ​internal IM ​services, you can more easily IM with your ​corporateclients. The ​applets you IM your friends directly from your ​mobilephone.
(Definition of IM from the Cambridge Business English Dictionary © Cambridge University Press)
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“IM” in Business English

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