From Longman Dictionary of Contemporary Englishin a dreamin a dreamIMAGINEhaving a state of mind in which you do not notice or pay attention to things around you Ruth went about her tasks in a dream. → dream
Examples from the Corpus
in a dream• You were asleep; in a dream over this woman, and time went by.• I can't see him physically but I meet with him in dreams.• He seemed to be moving through mud, his actions hampered as if in a dream.• Tod's hidden mind insists, in dream form, that Tod feels pain.• This means that you live in a dream.• Except only in dreams would we be that flexible and sure-footed.• The town had emerged like a place in a dream.• She moved as if she were in a dream, wading through viscous liquid. 