alertness

Noun (3)

1. the process of paying close and continuous attention“wakefulness, watchfulness, and bellicosity make a good hunter”“vigilance is especially susceptible to fatigue”Synonyms: watchfulnesswakefulnessvigilance
2. a state of readiness to respond“alerting was indicated by the desynchronization of the EEG”Synonyms: alerting
3. lively attentivenessSynonyms: sharp-sightednesson the qui vive