Definition of Alert:

  1. Warn (someone) of a danger, threat, or problem, typically with the intention of having it avoided or dealt with.

  2. Quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant.

  3. The state of being watchful for possible danger.

  4. Notification that (1) a threshold has been reached (2) an incident has occurred which may develop into a disaster, (3) an interruption may occur due to planned events such as repairs or a system upgrade or, (4) an interruption may occur due to uncontrollable but expected events such as a hurricane warning.

Synonyms of Alert

Vigilance, Watchfulness, Carefulness, Attentiveness, Guardedness, Care, Caution, Cautiousness, Wariness, Chariness, Alertness, Circumspection, Prudence, Heedfulness, Heed, Mindfulness, Warn, Notify, Apprise, Caution, Put on ones guard, Forewarn, Put on the qui vive, Arouse, Klaxon, Mayday, SOS, Active, Admonish, Advertent, Advise, Agile, Agog, Air-raid alarm, Alarm, Alarm bell, Alarm clock, Alarm signal, Alarum, Alert for, Alive, All clear, All ears, All eyes, Animated, Apt, Arouse, Assiduous, Attentive, Awake, Aware, Beacon, Blinking light, Brainy, Breathe, Bright, Brilliant, Burglar alarm, Buzz, Buzzer, Cant, Careful, Caution, Cautious, Clear-sighted, Clear-witted, Clearheaded, Clever, Concentrated, Confide, Confide to, Conscious, Crostarie, Cry havoc, Cry wolf, Decisive, Diligent, Earnest, Entrust with information, Equal to, Expeditious, Fiery cross, Finical, Finicking, Finicky, Fire alarm, Fire bell, Fire flag, Five-minute gun, Flashing light, Fly storm warnings, Fog bell, Fog signal, Foghorn, Forewarn, Frighten, Frisky, Full of life, Gale warning, Gay, Give confidential information, Give fair warning, Give notice, Give warning, Heedful, Hooter, Horn, Hue and cry, Hurricane warning, Immediate, Instant, Instantaneous, Intense, Intent, Intentive, Issue an ultimatum, Keen, Knowing, Let in on, Let next to, Lighthouse, Lively, Loaded for, Lookout, Mention privately, Mercurial, Meticulous, Mindful, Nice, Niggling, Nimble, Note of alarm, Notify, Observant, Observing, Occulting light, On guard, On the, On the alert, On the ball, On the job, On the lookout, Open-eared, Open-eyed, Openmouthed, Police whistle, Prepared for, Prompt, Punctual, Put hep, Put next to, Qui vive, Quick, Quick-witted, Ready, Ready for, Regardful, Sharp, Signal, Signal of distress, Siren, Sleepless, Small-craft warning, Smart, Sound the alarm, Sound the tocsin, Speedy, Spirited, Sprightly, Spry, Startle, Still alarm, Storm cone, Storm flag, Storm warning, Summary, Swift, Threaten, Tip, Tip off, Tocsin, Two-minute gun, Unblinking, Unnodding, Unsleeping, Unwinking, Up, Up for, Up to, Upside-down flag, Utter a caveat, Vigilant, Vivacious, Wakeful, Warn, Warn against, Warning, Wary, Watchful, Whisper, Whistle, Wide awake, Wide-awake, Vigilant, Wide awake, Aware, Watchful, Attentive, Observant, Circumspect, Wary, Chary, Heedful, Canny

How to use Alert in a sentence?

  1. An alert police officer discovered a truck full of explosives.
  2. He alerted people to the dangers of smoking.
  3. Security forces were placed on alert.

Meaning of Alert & Alert Definition