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Definition of First World noun from the Oxford Advanced Learner's Dictionary

First World

noun
 
/ˌfɜːst ˈwɜːld/
 
/ˌfɜːrst ˈwɜːrld/
[singular]
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  1. the rich industrial countries of the world
    • First World consumers will have to eat less meat.
    compare Third World
See First World in the Oxford Advanced American Dictionary
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