- Vigilance is the state of constantly being watchful of potential dangers or threats.
An example of vigilance is when a security guard is always on alert, waiting and watching for something to happen.
vigilance definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the quality or state of being vigilant; watchfulness
Origin: French ; from Classical Latin vigilantia
vigilance definition by American Heritage Dictionary