Real Dictionary

regency
Regency is used to refer to the period in Britain at the beginning of the nineteenth century, and to the style of architecture, literature, and furniture that was popular at the time.

regency in American English
designating or of a style of furniture of the French or British regencies, the French style characterized by scrollwork combined with natural forms, many curves, and strict balance and proportion, the English style by less massive forms and featuring meta
the position, function, or authority of a regent or group of regents
adjective: of or pertaining to a regency
noun: 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

regency in British English
adjective: characteristic of or relating to the Regency periods in France or the United Kingdom or to the styles of architecture, furniture, art, literature, etc, produced in them
noun: (in the United Kingdom) the period (1811–20) during which the Prince of Wales (later George IV) acted as regent on account of his father's mental illness
noun: government by a regent or a body of regents