9 Grammatical Pitfalls


[vij-uh-luh nt] /ˈvɪdʒ ə lənt/
keenly watchful to detect danger; wary:
a vigilant sentry.
ever awake and alert; sleeplessly watchful.
Origin of vigilant
1470-80; < Latin vigilant- (stem of vigilāns), present participle of vigilāre to be watchful. See vigil, -ant
Related forms
vigilantly, adverb
vigilantness, noun
hypervigilant, adjective
hypervigilantly, adverb
hypervigilantness, noun
nonvigilant, adjective
nonvigilantly, adverb
nonvigilantness, noun
previgilant, adjective
previgilantly, adverb
supervigilant, adjective
supervigilantly, adverb
unvigilant, adjective
unvigilantly, adverb
Can be confused
vigilant, vigilante.
2. wide-awake, sleepless. See alert.
1. careless. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for vigilant
  • Those charged with protecting those ecosystems have to be that much more vigilant.
  • The best thing you can do is to be vigilant and to keep pressure on the government to uphold rigorous security standards.
  • We need to be more vigilant concerning about our environment, let keep it clean and let reduce our emission.
  • The citizens of this country should be vigilant in watching what is legislated and what is taught in their own area.
  • He is energetic and thoughtful in his research and vigilant against what should be called cable-channel alarmism.
  • Perhaps the students were not as vigilant as possible in terms of choosing which school to attend.
  • People behind the protection wall tend to be less vigilant or reduce private mitigation measures.
  • But these are not the only points to which you look for vigilant watchfulness.
  • Many signs seem to have emerged, and if we're not vigilant, the economic situation will be difficult to rein in.
  • It has to be vigilant against malicious rumors and outside interference.
British Dictionary definitions for vigilant


keenly alert to or heedful of trouble or danger, as while others are sleeping or unsuspicious
Derived Forms
vigilantly, adverb
vigilantness, noun
Word Origin
C15: from Latin vigilāns keeping awake, from vigilāre to be watchful; see vigil
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for vigilant

late 15c., from Latin vigilantia "wakefulness," from vigilia (see vigil). Related: Vigilantly.

Online Etymology Dictionary, © 2010 Douglas Harper
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