fondu Syllabification: (fon·du)Pronunciation: /fänˈd(y)o͞o/Definition of fondu adjective [postpositive] Ballet (of a position) involving a lowering of the body by bending the knee of the supporting leg:an arabesque fonduOrigin: mid 19th century: French, literally 'melted'fondu in other Oxford dictionaries Definition of fondu in the British & World English dictionary