alertness, acuity, watchfulness; see attention 1, 2, diligence.
"vigilance." YourDictionary, n.d. Web. 12 October 2018. <http://thesaurus.yourdictionary.com/vigilance>.
vigilance. (n.d.). Retrieved October 12th, 2018, from http://thesaurus.yourdictionary.com/vigilance
The act of carefully watching:
The condition of being alert:
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