Significados de underground groups en inglés

Who were these " underground groups" and "high-tech operators?"

B&S have been one of the great British underground groups, but a wider audience awaits this heavenly indie collective.

It is not a complete list of underground groups-therehas never been such a list, and there never will be.

Ukrainian born Eldad immigrated to British run Palestine in 1941 and led Lehi, the most militant of the Jewish underground groups fighting for independence.

Many " underground groups" are software pirates, "warez d00dz," who might break copy protection and pirate programs, but likely wouldn't dare to intrude on a computer-system.

Underground groups-subcultures-canbe distinguished from independent cultures by their habit of referring constantly to the parent society.

(...) Underground groups have been formed for the purpose of exchanging information relevant to their criminal activities.