A no-longer supported version of Drupal. The term can also mean code inserted into modern software for the purpose of maintaining an older or previously supported feature.

existing computer software that's important enough for programmers to maintain or that new computer hardware must run, despite the software's age and shortcomings. Often viewed as a burden f [..]

Legacy code refers to an application system source code type that is no longer supported. Legacy code can also refer to unsupported operating systems, hardware and formats. In most cases, legacy code [..]