antinuclear Syllabification: (an·ti·nu·cle·ar)Pronunciation: /ˌantēˈn(y)o͞oklēər, ˌantī-/Translate antinuclear | into German Definition of antinuclear adjective [attributive] opposed to the development of nuclear weapons or nuclear power. antinuclear in other Oxford dictionaries Definition of antinuclear in the British & World English dictionary