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be alert

VERB
look out
Synonyms
WEAK
be careful be on guard beware check out have a care heads up hearken keep an eye out keep tabs listen mind notice pay attention peg pick up on scope shotgun size up spot spy watch out
Antonyms
WEAK
disregard ignore neglect

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.

Schnabel said the experience of 2022 has taught policymakers what to look out for as warning signs when they are assessing the impact of an energy shock, and they should be alert.

From The Wall Street Journal • Mar. 27, 2026

Investors will be alert to comments from top executives about future AI activity which could impact stocks and markets.

From Barron's • Feb. 16, 2026

“Directors should be alert and speak up is all that I can advise.”

From The Wall Street Journal • Nov. 10, 2025

The government agency said people should be alert to the symptoms of meningococcal meningitis and septicaemia, which can include a fever, headache, rapid breathing, drowsiness, shivering, vomiting, plus cold hands and feet.

From BBC • Oct. 30, 2025

And now, it is late, and I know how important it is to you all to be alert and rested as you enter your lessons tomorrow morning.

From "Harry Potter And The Goblet Of Fire" by J. K. Rowling