To give (someone) notice (of some event).
"The manager decided to notify the team about the unexpected shift change an hour before it was scheduled."
In plain English: To notify someone means to tell them something important so they know what is happening.
"Please notify me if your flight is delayed."
Usage: Use notify to mean formally informing someone about an upcoming event or official action, often through written communication. It is more specific than just telling and implies that the recipient needs to be aware of a change in status or schedule.
The word notify entered English from the Old French notifier, which originally meant to make something known or give notice. It traveled through Middle English as notifien before settling into its current form.