/ Dictionary / Index S spondylolisthesis: Meaning and Definition of Find definitions for: spon•dy•lo•lis•the•sis Pronunciation: (spon"dl-ō-lis-thē'sis), [key] — n. Pathol. the forward displacement of a vertebra. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spondylolisthesis (Thesaurus) spondylitis spondylosis Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language