instant message
noun [ C ]
COMMUNICATIONS, INTERNET ukus( abbreviation IM)a written message that can be sent over the internet to someone who is using the internet at the same time:
This software translates foreign-language instant messages.
instant message
verb [ I or T ]
COMMUNICATIONS, INTERNET ukus( abbreviation IM)to use the internet to exchange written messages very quickly with someone who is using the internet at the same time:
I need to be able to instant message my friends.