Definition of "gangsterism"

In a city known once as a centre of gangsterism and of beggars and prostitutes, it is claimed that now not a single night club exists. About 10,000 prostitutes were put into reformatories for labour reform and rehabilitation to Communist society.

1968, “SHANGHAI (SHANG-HAI)”, in Encyclopedia Britannica‎, volume 20, page 346, column 2

Charges to be laid include gangsterism, drug trafficking, weapons possession and conspiracy to commit murder.

2009 February 13, Peter Rakobowchuk, “Police hit bikers, gangs”, in Toronto Star‎