alert
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alert the public
To bring something to the attention of the public at large, especially as a warning of some kind. The purpose of her video was to alert the public to the risks of eating too much sugar. We want to alert the public that the business will be moving to a new location at the end of the month.
be on full alert
To be very attentive and ready to take action. This term is often applied to soldiers. We're safe here—the soldiers patrolling the border are on full alert. As soon as I heard my window break in the middle of the night, I was on full alert to fight off an intruder.
be on red alert
To be very attentive and ready to take action. This term is often applied to soldiers. We're safe here—the soldiers patrolling the border are on red alert. As soon as I heard my window break in the middle of the night, I was on red alert to fight off an intruder.
on red alert
At the ready to deal with or prepare for some imminent danger, threat, trouble, or difficulty. We're safe here—the soldiers patrolling the border are on red alert. As soon as I heard my window break in the middle of the night, I was on red alert to fight off an intruder.
alert someone
to something to make someone aware of trouble or potential trouble. The auditors alerted us to some problems with the accounts.
on the alert (for someone or something)
watchful and attentive for someone or something. Be on the alert for pickpockets. You should be on the alert when you cross the street in heavy traffic.
on the alert
Watchful, fully prepared, as in The inspectors are always on the alert for a manufacturing error. [Late 1700s]
on ˌred aˈlert
prepared for an emergency or for something dangerous to happen: Following the bomb blast, local hospitals have been put on red alert.on the alert
Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a rare species.