/ Dictionary / Index S Sir Gawain and the Green Knight*: Meaning and Definition of Find definitions for: Sir" Ga'wain and the Green' Knight' Pronunciation: [key] an English alliterative poem of unknown authorship, dating from the 14th century. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Siret siriasis Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language