Vigilant meaning
The definition of vigilant is watchful and alert.
An example of something vigilant is a guard dog.
adjective
On the alert, as for danger or error; watchful.
adjective
Staying watchful and alert to danger or trouble.
adjective
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
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From Wiktionary