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vigilance (n.)

1560s, from French vigilance (16c.), from Latin vigilantia "wakefulness, watchfulness, attention," from vigil "watchful, awake" (from PIE root *weg- "to be strong, be lively"). Related: Vigilancy (1530s).

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Definitions of vigilance from WordNet

vigilance (n.)
the process of paying close and continuous attention;
vigilance is especially susceptible to fatigue
Synonyms: watchfulness / wakefulness / alertness
vigilance (n.)
vigilant attentiveness;
Synonyms: watchfulness / weather eye
From wordnet.princeton.edu