/ Dictionary / Index S superl.: Meaning and Definition of Find definitions for: superl. Pronunciation: [key] superlative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. superjet superlative Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language