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sphere of influence

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noun, plural spheres of influence.
  1. any area in which one nation wields dominant power over another or others.
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Origin of sphere of influence

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for sphere of influence

sphere of influence

noun
  1. a region of the world in which one state is dominant
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012