/ Dictionary / Index S semimatte: Meaning and Definition of Find definitions for: sem•i•matte Pronunciation: (sem'ē-mat', sem'ī-), [key] — adj. midway between matte and glossy, as certain paper or paint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. semimajor axis semimicroanalysis Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language