ON THE ALERT Synonyms: 67 Similar and Opposite Words

on the alert

phrase

Definition of on the alert

as in alert

paying close attention usually for the purpose of anticipating approaching danger or opportunity Residents were warned to stay on the alert for changes in the storm's projected path.

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of on the alert London noir is a rare subgenre — and an especially difficult one to pull off — but Michele Fiascaris’ debut Rain Catcher is a satisfying, seductively atmospheric addition to the canon that will keep even the most jaded of viewers on the alert. — Damon Wise, Deadline, 6 July 2026

Recent Examples of Synonyms for on the alert

on the ball

Phrase

When Lammens stopped a shot in the 88th minute by Pau Cubarsi, Merino got to the ball fast enough to get his boot on the ball to create the go-ahead goal.

— Andrew Greif, NBC news, 10 July 2026
Late in the game, Portugal were spared extra time after Croatia's second goal was ruled out for an offside detected by the faintest touch on the ball.

— Jibin Joseph, PC Magazine, 6 July 2026

Definition of on the ball

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on tenterhooks

on the alert

on the ball

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“On the alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/on%20the%20alert. Accessed 12 Jul. 2026.

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Synonyms of on the alert

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