Eidgenossenschaft

Eidgenossenschaft (German pronunciation: [ˈaɪdɡəˌnɔsənʃaft]) is a German word meaning confederation. The term literally translates as "oath fellowship". An Eidgenossenschaft is a confederacy of equal partners, which can be individuals or groups such as states, formed by a pact sealed by a solemn oath. Such an alliance could be either time-limited or unlimited (or "eternal"). An important characteristic is that the partners were always considered equal, in contrast to the oath of fealty in feudal societies with their strict hierarchies.

As a political term, it is used most often as a synonym for Switzerland, whose official German name is "Schweizerische Eidgenossenschaft", usually translated as Swiss Confederation. The oath referred to is the Rütlischwur, the three men recorded as taking the oath on August 1, 1291 historiographic tradition are the Three Confederates (Drei Eidgenossen).

An Eidgenosse (literally: comrades by oath) is a member of an Eidgenossenschaft, and is an expression for "Swiss citizen".