▪ advance notice of something: "she had only had four days' warning before leaving Berlin"Similarnoticeadvance noticea word of warningforewarningalerthintsignalsignalarm bellsinformal:a tip-off
▪ an experience or sight that serves as a cautionary example to others:"his death should be a warning to everyone"
Word OriginOld Englishwar(e)nung (see warn, -ing1).