cause célèbre
nounNAmE//ˌkɔz səˈlɛb//, NAmE//ˌkɔzsəˈlɛbrə//
(from French) (pl. causes célèbres NAmE//ˌkɔz səˈlɛb//, NAmE//ˌkɔzsəˈlɛbrə//
)Check pronunciation: cause célèbre
Definition of cause célèbre noun from the Oxford Advanced American Dictionary