/ Dictionary / Index N nonage: Meaning and Definition of Find definitions for: non•age Pronunciation: (non'ij, nō'nij), [key] — n. the period of legal minority, or of an age below 21. any period of immaturity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nonage (Thesaurus) nonachiever nonagenarian Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language