the office, jurisdiction, or control of a regent or body of regents exercising the ruling power during the minority, absence, or disability of a sovereign.
2.
a body of regents.
3.
a government consisting of regents.
4.
a territory under the control of a regent or regents.
5.
the term of office of a regent.
6.
(initial capital letter) British History. the period (1811–20) during which George, Prince of Wales, later George IV, was regent.
7.
(initial capital letter) French History. the period of the minority of Louis XV.
8.
the office or function of a regent or ruler.
–adjective
9.
of or pertaining to a regency.
10.
History/Historical. of or pertaining to the Regencies in England or France.
11.
(often initial capital letter) of or pertaining to the style of architecture, furnishings, and decoration of the British Regency, somewhat similar to the French Directoire and Empire styles and characterized by close imitation of ancient Greek forms as well as by less frequent and looser adaptations of ancient Roman, Gothic, Chinese, and ancient Egyptian forms.
Origin: 1400–50; late ME < ML rēgentia.See regent, -ency
A person or group selected to govern in place of a monarch or other ruler who is absent, disabled, or still in minority.
The period during which a regent governs.
The office, area of jurisdiction, or government of regents or a regent.
adj.
Regency Of, relating to, or characteristic of the style, especially in furniture, prevalent in England during the regency (1811-1820) of George, Prince of Wales (later George IV).
Regency Of, relating to, or characteristic of the style prevalent in France during the regency (1715-1723) of Philippe, Duc d'Orléans (1674-1723).
Of or relating to a regency: regency policies and appointments that were later rescinded.
[ree-juh
n-see] 
noun, plural -cies, adjective