Underground

proper nouncommon in dialogue

The London Underground.

proper noun

1
The London Underground.
Although some of the stations on ' The Branch ' have not, as yet, suffered any considerable structural alterations, all are now equipped with the familiar Underground type name boards, and as a result the imposing titles of G.N. days have been ruthlessly curtailed.
Heathrow has a 28% share of passengers arriving by rail, two-thirds of whom come by the Underground.

underestimate · To estimate too low; to perceive (someone or something) as…undergo · To experience; to pass through a phase.underground · Below the ground; below the surface of the Earth.

Underground · The London Underground.

underlying · Lying underneath.undermine · To dig underneath (something), to make a passage for…underneath · Below; in a place beneath.

The neighbouring pages — Alphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.