Underground
See also: underground
English
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8f/ARNOS_GROVE-05_240710_CPS_%284837090727%29.jpg/150px-ARNOS_GROVE-05_240710_CPS_%284837090727%29.jpg)
Proper noun
Underground
- (UK, 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
Further reading
London Underground on Wikipedia.Wikipedia