social networking website Tumblr https://en.wikipedia.org/wiki/Tumblr https://www.wikidata.org/wiki/Q384060 An American microblogging and social networking website founded by David Karp in 2007 and currently owned by Automattic. The service allows users to post multimedia and other content to a short-form blog. Users can follow other users' blogs. Bloggers can also make their blogs private. For bloggers many of the website's features are accessed from a "dashboard" interface.