— interregnal , adj.
/in'teuhr reg"neuhm/ , n. , pl. interregnums, interregna /-neuh/ .
1. an interval of time between the close of a sovereign's reign and the accession of his or her normal or legitimate successor.
2. any period during which a state has no ruler or only a temporary executive.
3. any period of freedom from the usual authority.
4. any pause or interruption in continuity.
[ 1570-80; inter- INTER- + regnum REIGN ]