Dictionary

tube train en · NOUN

Etymology

Probably named after the shape of the tunnels; the Tube is an informal name for London Underground which has been trademarked.

Meanings

1. (UK) A smaller-profile underground train which operates through the tube tunnels under London, which have a small cross section.
   • I took a tube train through the subway systems / I rode those tunnels like a six-foot mole 1979, The Boomtown Rats, “Wind Chill Factor (Minus Zero)”, in The Fine Art of Surfacing:

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