world Definition in Cambridge British English Dictionary
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Definition of "world" - British English Dictionary

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worldnoun

uk   /wɜːld/  us   /wɝːld/

world noun (THE EARTH)

A1 [S] the Earth and all the people, places, and things on it: Different parts of the world have very different climatic conditions. Which bridge has the longest span in the world? News of the disaster shocked the (whole/entire) world. We live in a changing world and people must learn to adapt. She's a world authority on foetal development. a world record/championship
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world noun (GROUP/AREA)

B1 [C usually singular] a group of things such as countries or animals, or an area of human activity or understanding: the Muslim world the modern/industrialized world the animal world stars from the rock music world Unexpected things can happen in the world of subatomic particles.
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world noun (PLANET)

[C] a planet or other part of the universe, especially one where life might or does exist: There was a man on the news last night who reckons we've been visited by beings from other worlds.
(Definition of world from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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