The term country refers to a political entity or its territory in the world. They function as sovereign states, unrecognized states, constituent countries, or dependent territories. A country may consist of multiple nations, a structure known as a multinational state. Countries are often distinguished as developing countries or developed countries. There is no universal agreement on the number of "countries" in the world. This ambiguity is a result of several countries not being recognized as sovereign states by the UN system, but are recognized by at least one UN member, known as "diplomatic recognition". These countries often have disputed territories and have only partial recognition. A number of entities without recognition are also commonly considered a country.