1. condition of heightened watchfulness or preparation for action

    Synonyms : qui vive
    Type Of : preparation, preparedness, readiness
    Examples :
    • bombers were put on alert during the crisis
  2. warn or arouse to a sense of danger or call to a state of preparedness

    Synonyms : alarm
    Type Of : warn
    Examples :
    • We alerted the new neighbors to the high rate of burglaries
  3. engaged in or accustomed to close observation

    Synonyms : watchful
    Antonyms : unalert
    Examples :
    • 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
  4. mentally perceptive and responsive

    Synonyms : alive, awake
    Examples :
    • an alert mind
    • alert to the problems
  5. quick and energetic

    Synonyms : brisk, lively, merry, rattling, snappy, spanking, zippy
  6. a warning serves to make you more alert to danger

    Synonyms : alerting
    Type Of : warning
  7. an automatic signal (usually a sound) warning of danger

    Synonyms : alarm, alarum, warning signal
    Type Of : signaling, sign, signal


  1. profoundly honored

    Synonyms : revered, venerable
  2. of or befitting a lord

    Synonyms : grand, lordly
    Examples :
    • of august lineage
  3. the month following July and preceding September

    Synonyms : aug
    Type Of : gregorian calendar month