/ Dictionary / Index T Top-Sider: Meaning and Definition of Find definitions for: Top-Sid•er Pronunciation: (top'sī"dur), [key] — Trademark. Trademark. a brand of casual shoe with a nonskid sole, designed esp. for wear on boats. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. topside top slicing Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language