/ Dictionary / Index S sidespin: Meaning and Definition of Find definitions for: side•spin Pronunciation: (sīd'spin"), [key] — n. a spinning motion imparted to a ball that causes it to rotate in course about its vertical axis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sideslip sidesplitter Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language