A ghost station is a disused train station through which revenue-service passenger trains (especially rapid transit trains) pass but at which they do not stop. The term is also sometimes used for any unused underground station or any unused station, whether or not trains pass through them. In Germany, a station that has been built in the course of constructing something else as a so-called "Bauvorleistung" (roughly: construction pre-effort) is referred to as a "ghost station", despite the different purpose and origin of the terms. Some English-language publications also refer to "pre-built" stations or parts thereof that have yet to see service as "ghost stations".