Out of this world means so good that it seems beyond anything ordinary. The food was out of this world.
It is used most about food and music, which are the things people struggle to describe. To call something out of this world is warm exaggeration and nobody takes it literally.
1phraseout of this worldSo good that it seems beyond anything ordinary.
“The view from the top was out of this world.”
out of this world is a phrase.
Practised in Idioms