Courtesy of Wikipedia,
An interregnum (plural interregna or interregnums) is a period of discontinuity or "gap" in a government, organization, or social order. Archetypally, it was the period of time between the reign of one monarch and the next (coming from Latin inter-, "between" + rēgnum, "reign" [from rex, rēgis, "king"]), and the concepts of interregnum and regency therefore overlap.
