An edit-a-thon (sometimes written editathon) is an event where some editors of online communities such as Wikipedia, OpenStreetMap (also known as a "mapathon"), and LocalWiki edit and improve a specific topic or type of content. The events typically include basic editing training for new editors and may be combined with a more general social meetup. The word is a portmanteau of "edit" and "marathon". An edit-a-thon can either be "in-person" or online or a blended version of both. If it is not in-person, it is usually called a "virtual edit-a-thon" or "online edit-a-thon".