/ Dictionary / Index S synovitis: Meaning and Definition of Find definitions for: syn•o•vi•tis Pronunciation: (sin"u-vī'tis), [key] — n. Pathol. inflammation of a synovial membrane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synovitis (Thesaurus) synovia synsacrum Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language