Definitions

vigilant

[vij-uh-luhnt] / ˈvɪdʒ ə lənt /

ADJECTIVE

careful, watchful

Synonyms

STRONGEST

anxious attentive aware cautious circumspect keen observant wary

WEAK

acute agog alert guarded looking for looking to on alert on guard on the ball on the job on the lookout on the qui vive on toes open-eyed sharp sleepless unsleeping waiting on wakeful wide-awake with eyes peeled with weather eye open

Antonyms

STRONGEST

careless heedless ignorant inattentive incautious indifferent indiscreet rash thoughtless unaware uncareful unobservant

WEAK

impulsive negligent

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.

He urged the public to stay vigilant and "report these scams".

From BBC • Jun. 9, 2026

Economy Minister Roland Lescure said after the figures that the government "remained vigilant, but without giving in to fear-mongering".

From Barron's • May 29, 2026

Hustled from the scene by a neighboring florist, she meets the vigilant but eccentric Neighborhood Watch group at the home of reclusive former detective Augusta Dupin.

From Los Angeles Times • May 12, 2026

The takeaway from your letter — and the lesson for readers — is that it’s important to be vigilant.

From MarketWatch • May 11, 2026

Rahel, on the other hand, was wide awake, fiercely vigilant and brittle with exhaustion from her battle against Real Life.

From "The God of Small Things" by Arundhati Roy

Vocabulary lists containing vigilant

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