first world

noun, often capitalized F&W

Definition of first world 

: the highly developed industrialized nations often considered the westernized countries of the world

First Known Use of first world

1967, in the meaning defined above

History and Etymology for first world

after third world

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The first known use of first world was in 1967

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first world

noun

English Language Learners Definition of first world

: the countries of the world that have many industries and relatively few poor people : the rich nations of the world

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