Synonyms: alertness, sharp-sightedness, on the qui vive
Definition: lively attentiveness
Similar words: attentiveness
Definition: the trait of being observant and paying attention
Synonyms: alertness, watchfulness, vigilance, wakefulness
Definition: the process of paying close and continuous attention
Usage: wakefulness, watchfulness, and bellicosity make a good hunter; vigilance is especially susceptible to fatigue
Similar words: attention
Definition: the faculty or power of mental concentration
Usage: keeping track of all the details requires your complete attention
Definition: a state of readiness to respond
Usage: alerting was indicated by the desynchronization of the EEG
Similar words: arousal
Definition: a state of heightened physiological activity