(mythology) A mythological motif, found in the creation myths of many cultures and civilizations, of an egg from which the universe or some primordial being is "hatched".

(fantasy) An internally consistent, fictional, fantasy world or setting that is different from the real "primary world".

(fantasy) The real world of the reader or viewer, as opposed to the imaginary "secondary world" of a work of fiction.

plural of world egg

A language spoken internationally and which is learned by many people as a second language.

(programming, by extension) A simple first program for any purpose.

(programming) A simple script or program designed to output the text "Hello World" as a demonstration of the computer language or environment.

(slang, derogatory) Wal-Mart / A fictional or hypothetical large theme park.

plural of world order

(idiomatic) To improve one's social or financial position.