A dominant-party system or one-party dominant system is a system where there is "a category of parties/political organisations that have successively won election victories and whose future defeat cannot be envisaged or is unlikely for the foreseeable future." Many are de facto one-party systems, and often devolve into de jure one-party systems. Usually, the dominant party consistently holds majority government, without the need for coalitions.
Examples commonly cited include: United Russia (CP) in Russia, the Justice and Development Party (AKP) in Turkey, Serbian Progressive Party (SNS) in Serbia, Democratic Party of Socialists of Montenegro (DPS) in Montenegro, the People's Action Party (PAP) in Singapore, the Barisan Nasional (BN) in Malaysia, the African National Congress (ANC) in South Africa, the Liberal Democratic Party in Japan, Awami League in Bangladesh, MPLA in Angola and the ZANU-PF in Zimbabwe.
Most dominant-party states are illiberal democracies, with a tendency of suppressing freedom of expression and manipulating the press in favor of the ruling party.