on the alert
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In response to the floods, the worst in 30 years, authorities were on the alert, reinforcing earthen barriers and preparing to evacuate if needed.
From Barron's ● Jun. 2, 2026
It’s a play on the alert that heralded a new participant in online chat rooms of the 1990s and aughts, a time when many of this phrase’s current users weren’t born.
From The Wall Street Journal ● Oct. 16, 2025
Motorists have been warned to be on the alert for scammers posing as car finance lenders offering fake compensation.
From BBC ● Aug. 11, 2025
The intelligence community is on the alert for spies looking to penetrate America’s commercial space sector through cyberattacks and strategic investments to gain access to critical networks.
From Washington Times ● Aug. 22, 2023
He knew nothing, he had no ideas, and he was constantly, painfully on the alert for any indication that Hermione too was about to tell him that she had had enough, that she was leaving.
From "Harry Potter and the Deathly Hallows" by J.K. Rowling
