warn·ing
| \ ˈwȯr-niŋ
\
1
: the act of warning : the state of being warned
he had warning of his illness
2
: something that warns or serves to warn
especially
: a notice or bulletin that alerts the public to an imminent hazard (such as a tornado, thunderstorm, or flood)
: serving as an alarm, signal, summons, or admonition
a warning bell a warning shot