/ Dictionary / Index S spinous process: Meaning and Definition of Find definitions for: spi'nous proc"ess Pronunciation: [key] — Anat., Zool. Anat.,Zool. a spinelike process of a bone, esp. the dorsal projection from the center of the arch of a vertebra. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spinous spin-out Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language