† inteˈrregencyObs.rare. [f. next: see -ency.] The tenure of an interrex or interregent; an interreign. 1600[see interregnum 1].1620E. Blount Horae Subs. 226 Romulus began, and there succeeded him, after one yeeres interregency, Numa Pompilius.1674in Blount Glossogr. (ed. 4).