faviconPronunciation: /ˈfavɪkɒn, ˈfeɪvɪkɒn/Definition of favicon noun an icon associated with a particular website, typically displayed in the address bar of a browser accessing the site or next to the site name in a user’s list of bookmarks. Origin: early 21st century: blend of favourites and iconfavicon in other Oxford dictionaries Definition of favicon in the US English dictionary