In'ter-rēg'num, n.
n. [Lat. inter, between, and regnum, dominion, reign; It. interregno, Sp. interregno, Fr. interrègne. See REIGN.]
Sense 1. The time in which a throne is vacant between the death or abdication of a king and the accession of his successor.
Sense 2. Any period during which the executive branch of a government is suspended or interrupted, whether by vacancy of offices or a change of the government.