A cautionary story or a cautionary note to a story is one that is intended to give a warning to people.
例句
Barely fifteen months later, it has become a cautionary tale of the pitfalls of international mergers and acquisitions...不过15个月,它就成了告诫人们留心跨国并购中陷阱的警世故事。An editorial in The Times sounds a cautionary note.《泰晤士报》的一篇社论读起来颇有警诫意味。
英英词典释义
Adjective
1. tending to ward off;
"the swastika...a very ancient prophylactic symbol occurring among all peoples"- Victor Schultze
2. serving to warn;
"shook a monitory finger at him""an exemplary jail sentence"