/ Dictionary / Index S spineless: Meaning and Definition of Find definitions for: spine•less Pronunciation: (spīn'lis), [key] — adj. having no spines or quills. having no spine or backbone. having a weak spine; limp. without moral force, resolution, or courage; feeble: a spineless, lily-livered coward. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spineless (Thesaurus) spinel spinel ruby 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