From Longman Dictionary of Contemporary Englishgangstergang‧ster /ˈɡæŋstə $ -ər/ ●○○ noun [countable] SCCa member of a violent group of criminals
Examples from the Corpus
gangster• There were no fractious sects and gangsters to challenge his authority.• And get away with it when the bigger gangsters take on each other.• Any budding gangsters can also savour the Chicago nightlife.• But big-city gangsters also play a part.• Not in the first half when the Cougars jumped on the Bears like gangsters on a patsy delinquent on his payments.• If the rest of us can not beat the gangsters, we may well be tempted to join them.• Kidnapping the officers, the gangsters fled. 