interregnum
noun/ˌɪntəˈreɡnəm/
/ˌɪntəˈreɡnəm/
[usually singular] (plural interregnums)
(formal)- a period of time during which a country, an organization, etc. does not have a leader and is waiting for a new oneWord Originlate 16th cent. (denoting temporary rule between reigns or during suspension of normal government): from Latin, from inter- ‘between’ + regnum ‘reign’.
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interregnum