Meaning of the word underground in English

What does underground mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

underground

US /ˈʌn.dɚ.ɡraʊnd/
UK /ˈʌn.dɚ.ɡraʊnd/
"underground" picture

Adverb

1.

beneath the surface of the earth

Example:
The miners work underground.
Many animals live underground.
2.

in secret; surreptitiously

Example:
They operated an underground network to help refugees.
The band gained a large underground following before hitting the mainstream.

Noun

1.

a system of underground trains; a subway or metro

Example:
I take the Underground to work every day.
The London Underground is also known as the Tube.
2.

a secret group or movement, especially one resisting an occupying power or a totalitarian government

Example:
The resistance movement operated as an underground.
They joined the underground to fight for freedom.

Adjective

1.

situated or operating beneath the surface of the earth

Example:
The city has an extensive underground railway system.
They discovered an underground cave.
2.

denoting or relating to a cultural movement or subculture that is not mainstream or commercial

Example:
He's a fan of underground music.
The film has an underground following.
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