webisode Syllabification: (web·i·sode)Pronunciation: /'webiֽsōd/Definition of webisode noun an original episode derived from a television series, made for online viewing. an online video that presents an original short film or promotes a product, movie, or television series. Origin: 1990s: blend of Web and episodewebisode in other Oxford dictionaries Definition of webisode in the British & World English dictionary