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See also: underground


An older-style Underground roundel at Arnos Grove station.

Proper noun[edit]


  1. (Britain, rail transport) The London Underground.
    • 2019 October, John Glover, “Heathrow rail expansion”, in Modern Railways, page 71:
      Heathrow has a 28% share of passengers arriving by rail, two-thirds of whom come by the Underground.
    Synonym: Tube

Related terms[edit]

Further reading[edit]

Wikipedia-logo.svg London Underground on Wikipedia.Wikipedia