/ Dictionary / Index S supersession: Meaning and Definition of Find definitions for: su•per•ses•sion Pronunciation: (s"pur-sesh'un), [key] — n. the act of superseding. the state of being superseded. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supersession (Thesaurus) superserviceable super-smooth 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