alert
n. countablen. a warning signal that tells you about a danger or a problem. It can be a sound on your phone or a message from the government.
n. a signal, such as a siren or digital notification, that warns of an approaching danger or an urgent situation requiring immediate attention.
I received a weather alert on my phone this morning.
The security system sends an automatic alert to the police if the front door is forced open after midnight.
Despite the early morning hour, the emergency alert broadcast across all local radio stations, prompting residents to seek shelter before the storm reached the coast.
From French alerte (“alert”), from the phrase à l'erte (“on the watch”), from Italian all'erta (“to the height”), from erta (“lookout, tower”).
Formed within English by conversion, from alert (adjective). Compare French alerter.
Often used with the verbs 'issue', 'receive', or 'trigger'.