be on red alert
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.
See also: alert, on, red
Farlex Dictionary of Idioms.
- be on full alert
- on red alert
- chapter out
- remain down
- battle stations
- a forlorn hope
- forlorn
- forlorn hope
- in the heat of
- in the heat of (something)