A2
something that you do or think that is wrong
Dictionary examples:
Telling my boss he looks funny was a huge mistake. (0.0)
My mistake: I used shampoo instead of toothpaste this morning. (0.0)
I put salt in my coffee by mistake. Yuck! (0.0)
She made the mistake of giving him her phone number. (15.1)
We shouldn't have come here - it was a mistake. (16.7)
He made a lot of mistakes in his written test. (18.0)
This letter's full of spelling mistakes. (18.5)
It would be a big mistake to quit school. (23.5)
I'm not blaming you - we all make mistakes. (28.3)
I've discovered a few mistakes in your calculations. (32.0)