underground
/ˈʌndəɡɹaʊnd/
noun/ˈʌndəɡɹaʊnd/
/ˈʌndəɡɹaʊnd/
Meaning
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Meaning 1 · noun
An underground railway, especially for mass transit of people in urban areas.
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Meaning 2 · noun
A train that runs on such an underground railway.
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Meaning 3 · noun
A rapid transit system, regardless of the elevation of its right of way.
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Meaning 4 · noun
An underground walkway, tunnel for pedestrians (called pedestrian underpass in US).
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Meaning 5 · noun
An underground route for pipes, sewers, etc.
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Meaning 6 · noun
Regions beneath the surface of the earth, both natural (eg. caves) and man-made (eg. mines).
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Meaning 7 · noun
(with definite article) A movement or organisation of people who resist political convention.
“the French underground during World War II”
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Meaning 8 · noun
(with definite article) A movement or organisation of people who resist artistic convention.
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Meaning 9 · verb
To route electricity distribution cables underground
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Meaning 10 · adjective
Below the ground; below the surface of the Earth.
“There is an underground tunnel that takes you across the river.”
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Meaning 11 · adjective
Hidden, furtive, secretive.
“These criminals operate through an underground network.”
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Meaning 12 · adjective
Outside the mainstream, especially unofficial and hidden from the authorities.
“underground music”
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Meaning 13 · adverb
Below the ground.
“The tunnel goes underground at this point.”
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Meaning 14 · adverb
Secretly.
How this word is used
- General “the French underground during World War II”
- Everyday “There is an underground tunnel that takes you across the river.”
- General “These criminals operate through an underground network.”
- General “underground music”
- Everyday “The tunnel goes underground at this point.”
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Origin
Origin information unavailable.