asynchronous communication
nounUK /eɪˈsɪŋ.krə.nəs kəˌmjuː.nɪˈkeɪ.ʃən/
US /eɪˈsɪŋ.krə.nəs kəˌmjuː.nɪˈkeɪ.ʃən/
Talking with someone without both people being there at the same time.
Sending an email is a kind of asynchronous communication because your friend can read it later.
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OTHER MEANINGS
2. In computing, data sent without waiting for the receiver to be ready at the same moment.
The app uses asynchronous communication to send files in the background.
3. In electronics, signals that are not timed by a shared clock.
The old modem used asynchronous communication to transfer data.
4. Any exchange where replies come at different times, like letters or recorded videos.
Letters are an early form of asynchronous communication.