Laxi Dictionary

American Dictionary

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Definition the Underground in American English

the Underground noun

noun
/ˈʌndərˌɡraʊnd/
1

a group of people who take part in secret and usually illegal activities, especially against a government

Synonyms and related words
activist agitator anarchist
2

the subway

Synonyms and related words
Amtrak boat train bullet train
Definition the Underground in American English