be in another world

be in another world

To be lost in thoughts or daydreams and thus oblivious to one's surroundings. Jill must have been in another world when I asked her to turn off the oven because the bread is burned now. I have no idea what the professor said during today's lecture because I was in another world the whole time.
See also: another, world
Farlex Dictionary of Idioms.
See also:
  • be, live, etc. in a world of your own
  • get into a world of (one's) own
  • in (one's) own (little) world
  • in a world of (one's) own
  • in a world of own
  • in one's own world
  • live in a world of (one's) own
  • be in a world of (one's) own
  • be on another planet
  • Planet