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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.

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

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

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

From The Wall Street Journal • Mar. 26, 2026

Nvidia earnings ought to quell any major AI fears for now, but investors need to be alert for signs of who will be the winners and the losers.

From Barron's • Feb. 26, 2026

No matter how normal that is for me, I can’t get myself to stop shaking ’cause I can be alert as all hell right now and it won’t change what’s going down mad soon.

From "They Both Die at the End" by Adam Silvera