Origin of vigilantFrench from Classical Latin vigilans, present participle of vigilare, to watch from vigil, awake: see vigil
The definition of vigilant is watchful and alert.
An example of something vigilant is a guard dog.
On the alert, as for danger or error; watchful. See Synonyms at careful.
Origin of vigilantMiddle English from Old French from Latin vigilāns vigilant- present participle of vigilāre to be watchful ; see vigilante .
(comparative more vigilant, superlative most vigilant)
- But he watched all public incidents with a vigilant eye, and seized every passing opportunity of exposing departures from sound principle in parliament and courts of justice.
- He still knew the undergraduates individually, and watched their progress with a vigilant eye.
- Down to his death the pope kept a vigilant eye on the troubles in France.
- You will have to be vigilant in your work in order to earn an A in this class.
- My coworker was scolded during our quarterly meeting for not being vigilant in his budget assignments.