/ Dictionary / Index S Sargasso Sea: Meaning and Definition of Find definitions for: Sargas'so Sea' Pronunciation: [key] a relatively calm area of water in the N Atlantic, NE of the West Indies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sargasso sargassum Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language