plural of open world

plural of dream-world

plural of dream world

plural of external world

plural of clown world

(idiomatic, singular only) A combination of two seemingly contradictory benefits.

plural of brave new world

(physics) An interpretation of quantum mechanics that claims to resolve all the "paradoxes" of quantum theory by allowing every possible outcome to every event to define or exist in its own "history" or "world".

(idiomatic, singular only) A solution or scenario which combines the disadvantages of two opposed prior solutions, often having been intended to combine their benefits instead.

Any of various large international expositions held since the mid 19th century, often called "Expo".