Pareto Syllabification: (Pa·re·to)Pronunciation: /pəˈretō/Definition of Pareto adjective [attributive] denoting or involving the theories and methods of the Italian economist and sociologist Vilfredo Pareto (1848–1923), especially a formula used to express the income distribution of a society. Pareto in other Oxford dictionaries Definition of Pareto in the British & World English dictionary