English
underground
[ˈʌn.dəɡraʊnd]noun
❝
Meaning 1
A railway system in which electric trains travel through tunnels below ground.
❝
Meaning 2
People in a society who are trying new and often shocking or illegal ways of living or forms of art.
Example sentences:
❝In Britain and the USA in the 1970s, the underground was a powerful subversive force.