the process of paying close and continuous attention; wakefulness, watchfulness, and bellicosity make a good hunter; vigilance is especially susceptible to fatigue

[ Syn: watchfulness , wakefulness , vigilance ]

a state of readiness to respond; alerting was indicated by the desynchronization of the EEG

[ Syn: alerting ]

lively attentiveness

[ Syn: sharp-sightedness , on the qui vive ]