1. a period when normal government is suspended, especially between successive reigns or regimes.
▪ the period in English history from the execution of Charles I in 1649 to the Restoration of Charles II in 1660.
▪ an interval or pause between two periods of office or other things:"the interregnum between the discovery of radioactivity and its detailed understanding"
Word Originlate 16th century (denoting temporary rule between reigns or during suspension of normal government): from Latin, from inter- ‘between’ + regnum ‘reign’.