on the alert
IdiomsExample 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
Also be on the alert for any signs your financial adviser is sure we’re in—or not in—a bubble.
From The Wall Street Journal ● May 8, 2026
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
As his eyes followed the print the rest of his senses were on the alert to the various commotions that went on around him.
From "The Heart is a Lonely Hunter" by Carson McCullers
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
