1. Precept or warning against evil or danger of any kind; exhortation to wariness; advice; injunction.
  2. A careful attention to the probable effects of an act, in order that failure or harm may be avoided; prudence in regard to danger; provident care; wariness.
  3. Security; guaranty; bail.
  4. One who gives rise to attention or astonishment.
    Oh, that boy, he's a caution! He does make me laugh.
  5. A formal warning given as an alternative to prosecution in minor cases.


  1. To warn; to alert, advise that caution is warranted.

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