eBayEnglishOxford New American DictionaryeBay /ˈēˌbā, ˈiˌbeɪ / ▸ verb [with object] buy or sell (goods) through the eBay website. – DERIVATIVES eBayer – ORIGIN 1997 : from the proprietary name of the website eBay (from E cho Bay Technology Group, the name of a company run by eBay's founder, Pierre Omidyar).