Definition from macmillandictionary.com
Your browser doesn’t support HTML5 audio
I won’t make the same mistake again!
Don’t worry: it’s an easy mistake to make.
It’s much easier to correct mistakes at an early stage.
I wish you’d admitted your mistake earlier.
You’re making a big mistake.
The wrong choice of computer could prove a costly mistake.
Marrying him had been the biggest mistake of her life.
It would be a mistake to think that the trouble is over.
I made the mistake of inviting Jennifer to the party.