Alberti, Leon Battista Syllabification: (Al·ber·ti, Leon Battista)Pronunciation: /älˈbertē/Definition of Alberti, Leon Battista (1404–72), Italian architect, humanist, painter, and art critic. He wrote On Painting (1435), which was the first account of the theory of perspective in the Renaissance. Alberti, Leon Battista in other Oxford dictionaries Definition of Alberti, Leon Battista in the British & World English dictionary