1. French philosopher and writer born in Switzerland; believed that the natural goodness of man was warped by society; ideas influenced the French Revolution (1712-1778)(Freq. 13) • Syn: Jean-Jacques Rousseau • Derivationally related forms: Rousseauan • Instance Hypernyms: writer, author, philosopher 2. French primitive painter (1844-1910) • Syn: Henri Rousseau, Le Douanier Rousseau • Instance Hypernyms: painter