DéFI (Démocrate fédéraliste indépendant; French pronunciation: [defi] ) is a social-liberal and regionalist political party in Belgium mainly known for defending French-speakers' interests in and near the Brussels region. Founded in 1964, the party is led by François De Smet, a member of the Chamber of Representatives. The party's current name, DéFI or Défi, was adopted in 2016 and is a backronym of Démocrate, Fédéraliste, Indépendant (literally, "Democratic, Federalist, Independent") meaning "challenge" in French. Source: Wikipedia (en)