/ Dictionary / Index J junior miss: Meaning and Definition of Find definitions for: jun'ior miss' Pronunciation: [key] a teenage girl, esp. a subdebutante. See(def. 13). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Junior League junior school 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