Top-Sider definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a casual shoe, often made of canvas, having a nonskid rubber sole
Top-Sider definition by American Heritage Dictionary
A trademark used for a soft leather or canvas shoe with a rubber sole. This trademark often occurs in print in the plural: “[He] strides through his domain in designer jeans and Top-Siders” (Fortune).