Wiktionary
n. a prince who rules a monarchy in the capacity of a regent who is unfit to rule for whatever reason
Wikipedia
A prince regent, or prince-regent, is a prince who rules a monarchy as regent instead of a monarch, e.g., as a result of the Sovereign's incapacity (minority or illness) or absence (remoteness, such as exile or long voyage, or simply no incumbent). While the term itself can have the generic meaning and refer to any prince who fills the role of regent, historically it has mainly been used to describe a small number of individual Princes who were Regents.
Prince Regent is a British period television series made and transmitted by the BBC in 1979. It depicts the life of George IV from his youth, time as Prince Regent and his reign as King. It consists of eight episodes of 50 minutes.
Prince Regent (foaled 1935) was an Irish Thoroughbred racehorse who won the 1946 Cheltenham Gold Cup. He was the dominant steeplechaser in Ireland during World War II with his wins including the Irish Grand National in 1942. After the war he was able to compete in the major British chases and won the Cheltenham Gold Cup in 1946. He finished third when favourite for the 1946 Grand National and fourth in the race in 1947, carrying top weight on both occasions. He continued to race until the age of fourteen, retiring in 1949.
Usage examples of "prince regent".
Therefore, with your permission, I appoint my son Lysander Prince Regent—.
Therefore, with your permission, I appoint my son Lysander Prince Regent.
The elderly majordomo ushered in the Prince Regent Pharos Destramor, Heir to the Empire and its de facto ruler, small and dainty as ever in his goldlaced black velvet and leaning on the arm of the prettiest teenaged boy Joanna had ever seen.
And she understood now how the Prince Regent had become a hopeless paranoid at the age of ten, positive that his father the Emperor had ceased to be his father and unable to prove it to a soul.
She sipped from a glass of champagne and watched the Prince Regent make his stately progress about the tables set on the lawn's edge.
Now I, Prince Regent of Lutha, declare the throne vacant, and announce myself king!