From WordNet (r) 3.0 (2006):
warning
adj 1: serving to warn; "shook a monitory finger at him"; "an
exemplary jail sentence" [syn: admonitory,
cautionary, exemplary, monitory, warning(a)]
n 1: a message informing of danger; "a warning that still more
bombs could explode"
2: 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" [syn: admonition, monition, warning,
word of advice]
3: notification of something, usually in advance; "they gave
little warning of their arrival"; "she had only had four
days' warning before leaving Berlin"