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See also: Underground Railway
underground railway (plural underground railways)
- (rail transport) Synonym of subway: a railway under the ground.
- 2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 29:
- It was advisable to avoid building an underground railway beneath private houses at the time, because the law would require you to buy those houses.
- underground (as subway)
- (usually capitalized) Alternative form of Underground Railroad