[be] miles away
1
to have no idea what is happening around one, particularly because one is preoccupied with something else
- During the boring lecture, I was miles away, thinking about my upcoming vacation.
- Sarah had a distant look in her eyes, as if she was miles away and not listening to our conversation.
- As the soothing music played, he closed his eyes and was miles away in a world of relaxation.
- I called out to him, but he seemed to be miles away, lost in deep thought
- She was so engrossed in her book that she was miles away from the noisy cafe.