Meaning of vigilant

vig•i•lant

Pronunciation: (vij'u-lunt), [key]
— adj.
  1. keenly watchful to detect danger; wary: a vigilant sentry.
  2. ever awake and alert; sleeplessly watchful.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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