noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An official in Ancient Rome who acted as single head of state during the interregnum between two consulates.
2. 2
   An equivalent regent from the death of a Polish king till the election and enthronement of his successor.
3. 3
   A similar interim ruler, CEO, etc. figuratively

Etymology

From Latin inter- (“between”) + rex (“king”).

Related phrases

head of staterex sacrorum

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.