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Definitions for Alert

[1] fully aware and attentive; wide-awake; keen: an alert mind.
[2] swift; agile; nimble.
[3] an attitude of vigilance, readiness, or caution, as before an expected attack.
[4] a warning or alarm of an impending military attack, a storm, etc.: We'd just boarded the bus when the alert sounded.
[5] the period during which such a warning or alarm is in effect.
[6] to warn (troops, ships, etc.) to prepare for action.
[7] to warn of an impending raid, attack, storm, etc.: The radio alerted coastal residents to prepare for the hurricane.
[8] to advise or warn; cause to be on guard: to alert gardeners to the dangers of some pesticides.
[9] on the alert , on guard against danger; in readiness; vigilant: The state police are on the alert for an escaped convict believed to be in the area.
[10] vigilantly attentive alert to the problems
[11] brisk, nimble, or lively
[12] an alarm or warning, esp a siren warning of an air raid
[13] the period during which such a warning remains in effect
[14] on the alert on guard against danger, attack, etc watchful; ready on the alert for any errors
[15] to warn or signal (troops, police, etc) to prepare for action
[16] to warn of danger, an attack, etc

Words related to Alert

watchful, wise, wary, observant, active, bright, perceptive, wired, vigilant, sharp, careful, intelligent, alarm, signal, inform, notify, forewarn, ready, hip, quick

Words nearby Alert

aleppo boil, aleppo gall, aleppo pine, alerce, alerion, alert, alesia, alessandra, alessandri, alessandria, alessandro

Origin of Alert

1590–1600; 1940–45 for def 4 ; < Italian all'erta, equivalent to all(a ) to, on the + erta lookout, watchtower, orig. feminine of erto, past participle of ergere < Latin ērigere to erect

Other words from Alert

a·lert·ly , adverb
a·lert·ness , noun
hy·per·a·lert , adjective
un·a·lert·ed , adjective

Word origin for Alert

C17: from Italian all'erta on the watch, from erta lookout post, from ergere to build up, from Latin ērigere; see erect

Synonyms for Alert

active, bright, careful, intelligent, observant, perceptive, sharp, vigilant, wary, watchful, wired, wise, hip, jazzed, quick, ready, spirited, all ears, cagey, circumspect, clever, fast on the draw, good hands, heads up, heedful, on guard, on one's toes, on the ball, on the job, on the lookout, on the qui vive, psyched up, switched on, wide-awake, with it