/ Dictionary / Index Y youngest: Meaning and Definition of Find definitions for: young•est Pronunciation: (yung'gist), [key] — adj. superl. of —n. a person who is the least old of a group, as the youngest member of a family: Their youngest is still in high school. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: youngest (Thesaurus) Younger Edda* young-eyed Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language