/ Dictionary / Index S scission: Meaning and Definition of Find definitions for: scis•sion Pronunciation: (sizh'un, sish'-), [key] — n. a cutting, dividing, or splitting; division; separation. cleavage (def. 7). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: scission (Thesaurus) scissile scissor Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language