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Meaning of one-worlder

one-world•er

Pronunciation: (wun'wûrl'dur), [key]
— n.
  1. a person who supports or believes in any of various movements to establish a world government or a federation of nations stronger than any individual nation, for the purpose of promoting the common good.
  2. a person who believes in the possibility of peaceful cooperation among nations.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.