Vigilant definition

vĭjə-lənt
On the alert, as for danger or error; watchful.
adjective
14
2
Staying watchful and alert to danger or trouble.
adjective
12
3
The definition of vigilant is watchful and alert.

An example of something vigilant is a guard dog.

adjective
2
0
Watchful, especially for danger or disorder; alert; wary.

Be vigilant for signs of disease in your garden.

adjective
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1
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Origin of vigilant

  • Middle English from Old French from Latin vigilāns vigilant- present participle of vigilāre to be watchful vigilante

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French vigilant or its source, Latin vigilans, present participle of vigilare (“stay awake"), from vigil (“awake").

    From Wiktionary