/ Dictionary / Index N Nikkei: Meaning and Definition of Find definitions for: Nik•kei Pronunciation: (nē'kā), [key] an index showing the average closing prices of 225 stocks on the Tokyo Stock Exchange. an American of Japanese descent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nike of Samothrace Nikko Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language