consortism
/kənˈsɔːr.tɪzəm/Definitions
1. noun
The practice or principle of a monarch or noble having a consort or wife who shares power.
“The king’s consortism allowed his wife to make significant decisions in the kingdom.”
2. noun
A system or practice in which a person, especially a monarch or noble, shares power or authority with their partner or spouse.
“The queen’s consortism was seen as a major factor in her husband’s decision-making process.”