/ Dictionary / Index S siriasis: Meaning and Definition of Find definitions for: si•ri•a•sis Pronunciation: (si-rī'u-sis), [key] — n. Pathol. sunstroke. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: siriasis (Thesaurus) Sir Gawain and the Green Knight* Sirica Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language