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Definitions from WordNet

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Underground Railway

Definition:

The term "underground railway" refers to a system of trains that operates underground, usually in urban areas, providing a means of transportation for passengers.

Senses:

Noun

Sense 1:

A transportation system that consists of underground trains.

Example sentence: The underground railway in London is known as the "Tube."

Sense 2:

A secret or covert network that assists people, especially slaves, in escaping to freedom.

Example sentence: Harriet Tubman played a significant role in the operation of the Underground Railway during the mid-19th century.

Related Products:

• Books about Underground Railway
• Model trains of Underground Railway
• Documentaries on Underground Railway