Gangland (noun)

1. The world of organized crime, especially as it relates to the activities of street gangs.
2. The community or society of organized criminals or street gangs.

Origin:

1920s: from gang + land.

Examples:

1. The police were making a crackdown on gangland activity.
2. The city had a serious problem with gangland violence.
3. Gangland is a world of organized crime, usually associated with street gangs.
4. Gangland is a term used to describe the criminal underworld.
5. Gangland activities include drug trafficking, extortion and racketeering.