the act or utterance of one who warns or the existence, appearance, sound, etc., of a thing that warns
something that serves to warn, give notice, or caution
announcement from the U.S. National Weather Service alerting the public that a storm or other weather-related hazard is imminent and that immediate steps should be taken to protect lives and property
serving to warn, advise, caution
WARNING, something that warns (to make aware of impending or possible danger) [n]