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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 State Department recently warned fans attending games in Mexico to be on alert for pickpockets and scams, and to avoid hailing roadside taxis.

From The Wall Street Journal • Jun. 11, 2026

After the Joshua Tree earthquake, the Governor’s Office of Emergency Services issued an advisory for Southern California, warning people to be on alert for another, larger earthquake.

From Los Angeles Times • Dec. 22, 2025

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

From Barron's • Nov. 18, 2025

After raising her concerns with the WTA, the tournament's security team were informed and told to be on alert.

From BBC • Feb. 27, 2025

Lately, I felt like I always had to be on alert for the next raccoon invasion.

From "Crenshaw" by Katherine Applegate

be on alert

Example Sentences

Related Words