/ Dictionary / Index S spinal block: Meaning and Definition of Find definitions for: spi'nal block' Pronunciation: [key] See obstruction of the flow of spinal fluid by blockage of the spinal canal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spinal anesthesia spinal canal Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language