1.NounThe situation of two or more states sharing the same monarch, usually also with shared dynastic succession."The United Kingdoms of Sweden and Norway, also known variously as the United Kingdoms, Sweden and Norway or Sweden–Norway, was a personal union of the separate kingdoms of Sweden and Norway under a common monarch and common foreign policy that lasted from 1814 until its peaceful dissolution in 1905.; Many personal unions were ended by differences in the monarchies' rules of dynastic succession, while disputes thereabout lead to dynastic wars.; The Congo Free State was an independent kingdom in central Africa in personal union with Belgium under King Leopold."