Question 1

What does "turn a new leaf" mean?

Accepted Answer

To change one's behaviour or attitude for the better; to make a fresh start.

Question 2

How do you use "turn a new leaf" in a sentence?

Accepted Answer

After his release from prison, he vowed to turn a new leaf.

Question 3

Is "turn a new leaf" formal or informal?

Accepted Answer

"turn a new leaf" is register-neutral — appropriate in both casual and formal contexts. Used when someone commits to improving themselves, often after a period of bad behaviour.