/ Dictionary / Index S superstratum: Meaning and Definition of Find definitions for: su•per•stra•tum Pronunciation: (s'pur-strā"tum,--strat"um), [key] — pl. -stra•ta -stra•tums. an overlying stratum or layer. a set of features of a language traceable to the influence of a language formerly spoken within the same society by a dominant group:Cf. English has a Norman-French superstratum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: superstratum (Thesaurus) superstore superstring Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language