ALERT

Definition

1. verb warn or arouse to a sense of danger or call to a state of preparedness. — synonyms: alarm
2. adjective engaged in or accustomed to close observation. — synonyms: watchful
3. adjective quick and energetic. — synonyms: brisk, lively, merry, rattling, snappy, spanking, zippy
4. adjective mentally perceptive and responsive. — synonyms: alive(p), awake(p)
5. noun condition of heightened watchfulness or preparation for action. — synonyms: qui_vive
6. noun a warning serves to make you more alert to danger. — synonyms: alerting
7. noun an automatic signal (usually a sound) warning of danger. — synonyms: alarm, warning_signal, alarum