/ Dictionary / Index S submarginal: Meaning and Definition of Find definitions for: sub•mar•gin•al Pronunciation: (sub-mär'ju-nl), [key] — adj. near the margin. below the margin. not worth cultivating, as land; less than satisfactory; unproductive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. submandibular gland submarine 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