alert

6 definitions • 13 examples

quick to see, understand, and act in a particular situation:

I'm not feeling very alert today - not enough sleep last night!

A couple of alert readers posted comments on the website pointing out the mistake.

Parents should be alert to sudden changes in children's behaviour.

a warning to people to be prepared to deal with something dangerous:

a bomb alert

The army was put on (full) alert as the peace talks began to fail.

The public were warned to be on the alert for (= watching carefully for) suspicious packages.

a message, for example on your mobile phone or on television or radio, that warns you or gives you information about something:

You can set location-based alerts so your phone will remind you of something important when you are arriving at or leaving a location.

I get text alerts when I have used 80% of my mobile data.

to warn someone of a possibly dangerous situation:

An anonymous letter alerted police to the possibility of a terrorist attack at the airport.

quick to see, understand, and act in a particular situation:

When you’re driving, you must stay alert.

We had to be alert to any danger signs in the economy.

a warning to people to get ready to deal with something dangerous:

[ U ] The police were on the alert for (= watching carefully for) any sign of trouble.