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be on alert

VERB

watch

Synonyms

STRONGEST

attend guard protect take care of wait

STRONG

mind oversee patrol police superintend tend watch over

WEAK

be on the lookout be vigilant be wary be watchful care for keep an eye on keep eyes open keep eyes peeled keep watch over look after look out pick up on ride shotgun for take heed

Antonyms

STRONGEST

ignore neglect

WEAK

harm hurt overlook pass by

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.

The IMF chief said regulators should be on alert for any signs of instability in the financial system as a consequence of the conflict.

From The Wall Street Journal • Apr. 9, 2026

"There is the side to social media that is really harmful and really scary, and you have to be on alert all the time," she told BBC News.

From BBC • Nov. 25, 2025

Anyone playing in the already-volatile small-cap arena should be on alert to avoid getting burned.

From Barron's • Nov. 18, 2025

The school asked everyone on campus to remain indoors and be on alert.

From Los Angeles Times • Nov. 1, 2024

Whether or not a human knew what they were, an instinct inside them knew to be on alert, to be just a little afraid.

From "Night Owls" by A.R. Vishny

be on alert

Example Sentences

Related Words