alert

He is an alert boy.

He is a man alert in problem.

A sparrow is very alert in its movements.

alert enough to spot the opportunity when it came.

the alert stance of a batter in baseball.

You must keep alert in class.

The policeman alerted me to the danger.

He has an alert mind.

A monkey is very alert in its movements.

bird watchers on the alert for a rare species.

Drivers must be on the alert for traffic signals.

alert to danger; an alert bank guard.See Synonyms at aware

schools need to be constantly alert to this problem.

a vibrating alert is a discreet alternative to ringtones.

he alerted people to the dangers of smoking.

security forces are on the alert for an upsurge in violence.

the force went on red alert .

he had remained alert the whole time.

he put Camp Visoko on yellow alert .

The radio alert ed the citizens to prepare for the hurricane.

This is a verified alert! Take cover!

It's pretty interesting. This guy's working from a hypothesis where... Spoiler alert! Spoiler alert.

Kerry said every U.S. embassy and foreign mission will be alerted to this decision.

He alerted certain Order members at once.'

Just turn off the alerts, it's simple to do.

The Russian leader was on full handshake alert.

Police in Germany have issued similar alerts.

Do not just react to endless email alerts.

The city raised a red alert on Monday.

Authorities have raised the crisis alert to the highest.