1. (noun) watchfulness, wakefulness, vigilance, alertness
the process of paying close and continuous attention
Synonyms: alerting, alertness, wakefulness, on the qui vive, sharp-sightedness, weather eye, watchfulness, sleeplessness, vigilance
2. (noun) alertness, alerting
a state of readiness to respond
Synonyms: alerting, alertness, wakefulness, on the qui vive, sharp-sightedness, alert, watchfulness, vigilance
3. (noun) alertness, sharp-sightedness, on the qui vive
lively attentiveness
Synonyms: alerting, alertness, wakefulness, visual acuity, on the qui vive, sharp-sightedness, watchfulness, vigilance, acuity
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Synonyms and Antonyms of alertness 
