Big Five: Meaning and Definition of

Big' Five'

Pronunciation: [key]
— Hist. Hist.
  1. the United States, Great Britain, France, Italy, and Japan during World War I and at the Paris Peace Conference in 1919.
  2. (after World War II) the United States, Great Britain, the Soviet Union, China, and France.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.