the period from 1811-1820 when the Prince of Wales was regent during George III's periods of insanity
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the office of a regent
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Regency \Re"gen*cy\ (r?*jen*s?), n.; pl. {Regencies} (-s?z). [CF. F. r['e]gence, LL. regentia. See {Regent}, a.] 1. The office of ruler; rule; authority; government.
2. Especially, the office, jurisdiction, or dominion of a regent or vicarious ruler, or of a body of regents; deputed or vicarious government. --Sir W. Temple.
3. A body of men intrusted with vicarious government; as, a regency constituted during a king's minority, absence from the kingdom, or other disability.
A council or regency consisting of twelve persons. --Lowth.
Thomas Rowlandson, the regency caricaturist and watercolour painter, travelled extensively and sketched prolifically.