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.

Central Command tweeted that “U.S. forces across the Middle East remain vigilant and ready.”

From MarketWatch • Jun. 7, 2026

“We just need to remain absolutely vigilant, cautious and diligent,” said Macy Steers, co-head of financial lines at CNA Insurance.

From The Wall Street Journal • Jun. 2, 2026

Several African countries have advised their citizens to remain vigilant, with Ghana recently evacuating hundreds of its nationals, citing safety concerns.

From BBC • Jun. 1, 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

Surrounded by an ever vigilant crowd of baboons, she could hardly be safer finding new hunting grounds.

From "A Girl Named Disaster" by Nancy Farmer

Vocabulary lists containing vigilant

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