warning in WordNet English dictionary

1. cautionary advice about something imminent (especially imminent danger or other unpleasantness)
   "a letter of admonition about the dangers of immorality"; "the warning was to beware of surprises"; "his final word of advice was not to play with matches"
   admonition  monition  warning  word of advice 
   
2. a message informing of danger
   "a warning that still more bombs could explode"
   warning 
   
3. notification of something, usually in advance
   "they gave little warning of their arrival"; "she had only had four days' warning before leaving Berlin"
   warning 
   

1. serving to warn
   "shook a monitory finger at him"; "an exemplary jail sentence"
   admonitory  cautionary  exemplary  monitory  warning