instant message

noun
UK /ˈɪn.stənt ˈmes.ɪdʒ/
US /ˈɪn.stənt ˈmes.ɪdʒ/

A message you send to someone on a computer or phone that arrives right away.

I sent my friend an instant message to ask if she wanted to play.


OTHER MEANINGS

2. To send someone a message that arrives right away on a computer or phone.

She instant messaged me during the meeting.

3. A short typed conversation held in real time over the internet.

We had a quick instant message about the homework.

4. A feature in an app that lets people type back and forth live.

The game has an instant message box so players can talk.