walled garden noun4 •A garden enclosed by walls for purposes of shelter or decoration.The walled garden full of shadows blazed with colour as if the flowers were giving up the light absorbed during the day. — 1912 •Any closed platform. A closed platform is any computing system where the manufacturer retains monopolistic control over installation, distribution, and use of software and services. •(figurative) A closed platform for content or services controlled by a single carrier or service provider, typically requiring subscription to access.AOL tried to provide a walled garden for all their subscribers in the early 1990s. — 2007 •(Internet) A set of web pages or other resources that are richly interlinked and share a common focus, but have little or no linkage to or from the larger network.Link love is reciprocal; if you provide it liberally, it comes back to you. If you don't, you'll turn into your own walled garden. — 2007 formswalled gardens