eBayEnglishOxford Dictionary of EnglisheBay /ˈiːbeɪ / ▸ verb [with object] buy or sell (goods) through the eBay website. – DERIVATIVES eBayer noun– ORIGIN 1997: from the proprietary name of the website eBay (from Echo Bay Technology Group, the name of a company run by eBay's founder, Pierre Omidyar).