Sentence examples for on the alert from inspiring English sources

"on the alert" is an idiomatic phrase used to mean "watchful and alert for potential danger," and is perfectly usable in written English.
For example, "The police have been on the alert for any suspicious activity."

Dictionary

on the alert

adjective

Very attentive, or vigilant

  • Wild animals have to be constantly on the alert for predators.

Exact(60)

Always be on the alert for the sly joke, the one-liner and outright slapstick.

Civil society is on the alert.

Constituents on the alert for hypocrisy, take note.

The authorities are constantly on the alert for trouble.

"Our young patriots are on the alert," he said.

So security forces were on the alert after her arrest.

It will now also keep peaceable Scandinavians on the alert.

Mr. Breyfogle is also on the alert for résumé stuffing.

Eyes were darting about anxiously; everyone was on the alert.

Both are prolific, always on the alert and far ranging.

"Yes, but we've got to be on the alert".

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