/ Dictionary / Index S swim mask: Meaning and Definition of Find definitions for: swim' mask" Pronunciation: [key] mask (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. swim fin swimmeret Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language