/ Dictionary / Index S sphere of influence: Meaning and Definition of Find definitions for: sphere' of in'fluence Pronunciation: [key] any area in which one nation wields dominant power over another or others. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sphere spherical Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language