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.

Several African countries including Kenya, Malawi, Lesotho and Zimbabwe have advised their citizens to remain vigilant.

From BBC • Jun. 2, 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

The Riksbank recently held its key policy rate at 1.75%, although it pledged to remain vigilant about the risks of inflation rising due to high energy prices.

From The Wall Street Journal • May 8, 2026

Dad said we should stay vigilant, but by winter my attention had shifted back to the trifling dramas of my own life.

From "Educated" by Tara Westover

Vocabulary lists containing vigilant

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