Question

lose track of time Whenever I start reading a good book, I lose track of time.

Accepted Answer

When you give all your attention to something and become so engrossed in it that you don’t realize what time it is, you lose track of time.

Phrase/Idiom	lose track of time
Definition	When you give all your attention to something and become so engrossed in it that you don’t realize what time it is, you lose track of time.
Example	Whenever I start reading a good book, I lose track of time.

Lose Track Time I Give Attention Engrossed Don’t