vigilance

[vij-uh-luhns]
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noun

state or quality of being vigilant; watchfulness: Vigilance is required in the event of treachery.
Pathology. insomnia.

Origin of vigilance

1560–70; alteration (-ance for -ancy) of obsolete vigilancy < Latin vigilantia; see vigilant, -ancy
Related formshy·per·vig·i·lance, nounnon·vig·i·lance, nounpre·vig·i·lance, nounsu·per·vig·i·lance, noun

Synonyms for vigilance

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hypervigilance

vigilance

noun

the fact, quality, or condition of being vigilant
the abnormal state or condition of being unable to sleep
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

Word Origin and History for hypervigilance
n.

1917, from hyper- + vigilance. Related: Hypervigilant.

vigilance

n.

1560s, from French vigilance, from Latin vigilantia "wakefulness," from vigilia (see vigil).

Online Etymology Dictionary, © 2010 Douglas Harper