0 a person who rules a country for a limited period, because the king or queen is absent or too young, too ill, etc.
1 ruling as a regent:
the Prince Regent
2 (in the US) a member of the governing group of a university or educational system:
the Board of Regents
The town figured prominently as the Citadel of the Regent Queen.
Army officers petitioned the Regent Princess Isabel.
In the analysis of economic forms, moreover, neither microscopes nor chemical regents are of use.
It comprised three key elements: a child successor to the throne, female regents, and a complicit high-court personnel.
The reason was that effective power had already passed to regents.
We welcomed this development and regent indications that the dialogue was continuing to take place.
For many years he had been such a regent.