Pérez de Cuéllar, Javier Syllabification: (Pé·rez de Cué·llar, Javier)Pronunciation: /ˈpārās də ˈkwāyär/Definition of Pérez de Cuéllar, Javier (1920-), Peruvian diplomat; secretary general of the United Nations 1982–91. Pérez de Cuéllar, Javier in other Oxford dictionaries Definition of Pérez de Cuéllar, Javier in the British & World English dictionary