Definition of yakuza noun from the Oxford Advanced American Dictionary

 

yakuza

 noun
(also Yakuza)noun
NAmE//ˈyɑkʊˌzɑ//
 
, NAmE//ˈyɑkʊzə//
 
the yakuza[singular]
 
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a secret organization of criminals in Japan that is similar to the Mafia The yakuza is involved in gambling and sports. The Yakuza has a very complex organizational structure.