/ Dictionary / Index N Ninigi: Meaning and Definition of Find definitions for: Ni•ni•gi Pronunciation: (nē-nē'gē), [key] — n. Japanese Legend. the grandson of Amaterasu and first ruler of Japan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ninigi (Thesaurus) Ninib ninja Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language