An interregnum is a period between the end of one person's time as ruler or leader and the coming to power of the next ruler or leader. interregnums interregna a period of time when a country or organization has no ruler or leader, and they are waiting for a new one
{i} period of time between the end of one king's rule and the beginning of the next, time when a country has no ruler or official government; freedom from some authority; pause, interval