WORLD

(GROUP/AREA) [noun] [C usually singular] - a group of things such as countries or animals, or an area of human activity or understandingthe Muslim Worldthe industrialised worldthe modern worldthe animal worldthe world of dogsMany stars from the rock music world will be at the awards ceremony.Bizarre and unexpected things can happen in the world of subatomic particles.(UK informal) When a person goes up/comes down in the world (US and ANZ moves up/down in the world) they have more/less money or a better/worse social position.Roger and Ann have gone up in the world - these days they only ever travel first-class.