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Second World

American  

noun

(sometimes lowercase)

  1. the world's industrialized nations other than the U.S. and the U.S.S.R.

  2. the Communist and socialist nations of the world.

Etymology

Origin of Second World

First recorded in 1965–70

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.