Velázquez de Cuéllar, Diego Syllabification: (Ve·láz·quez de Cué·llar, Diego)Pronunciation: /vəˈläsˌk(w)ez dā ˈkwāyär/Definition of Velázquez de Cuéllar, Diego (circa 1465–1524), Spanish conquistador. After sailing with Columbus to the New World in 1493, he began the conquest of Cuba in 1511 and later initiated expeditions to conquer Mexico. Velázquez de Cuéllar, Diego in other Oxford dictionaries Definition of Velázquez de Cuéllar, Diego in the British & World English dictionary