My brother’s foolishness while driving his go cart served as a cautionary tale to anyone that didn’t want to end up in a similar wreck.

You can often look at the mistakes of other people and use them as a cautionary tale to avoid those mistakes in your own life.

Signs on the road serve a cautionary purpose, telling you the safest speed to go and what dangers may be approaching on the road.

My mother loves to give me a cautionary tale whenever I want to do something rash, though I’m not sure if she makes those stories up or if they really happened.

A cautionary tale is often a story of something bad that happened to someone else so you don’t have the same thing happen to you.