be 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.

Security Minister Dan Jarvis said people should be "alert and vigilant" but not "alarmed".

From BBC • Apr. 30, 2026

Smout urged everyone to be alert to the signs and symptoms of meningococcal meningitis and septicaemia, which can include a fever, headache, rapid breathing, drowsiness, shivering, vomiting and cold hands and feet.

From BBC • Apr. 17, 2026

That means investors trying to predict where Bitcoin goes next will have to be alert to where the U.S.-Iran talks go and how durable any agreement reached appears to be.

From Barron's • Apr. 10, 2026

“We have to be alert to second round effects but there are risks on both sides.”

From The Wall Street Journal • Mar. 26, 2026

You had to be alert every minute, just as everyone was alert now, looking at Bailey, wondering what Leon’s next move would be.

From "The Chocolate War" by Robert Cormier