What does be in a dream mean?

phr. to be so lost in thought that you don't notice what's happening around you

be in a dream

Frequency

Difficulty

Tags CEFR-B2

phrase

to be so lost in thought that you don't notice what's happening around you

When I heard the news, I was in a dream, not really paying attention to anything else.

to be so lost in thought that you don't notice what's happening around you