/ Dictionary / Index S Sémillon: Meaning and Definition of Find definitions for: Sé•mi•llon Pronunciation: (sā"mē-yōn' Fr. sā-mē-yôn'), [key] — n. a variety of white grape used in winemaking, esp. in France in the Sauternes district of Bordeaux. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. semiliterate semilogarithmic 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