alert adj
1: very attentive or observant; "an alert and responsive baby is a joy"; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty" [ant: unalert]
2: mentally responsive; "an alert mind"
3: not unconscious; especially having become conscious; "the patient is now awake and alert" [syn: awake(p)]
4: (usually followed by `to') showing acute awareness; mentally perceptive; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament" [syn: alive(p), awake(p)] (noun)
1: condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis" [syn: qui vive]
2: a warning serves to make you more alert to danger [syn: alerting]
3: an automatic signal (usually a sound) warning of danger [syn: alarm, warning signal, alarum] v : warn or arouse to a sense of danger or call to a state of preparedness; "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries" [syn: alarm]