1 the office of regent.
2 a commission acting as regent.
3 a the period of office of a regent or regency commission. b (Regency) a particular period of a regency, esp. (in Britain) from 1811 to 1820, and (in France) from 1715 to 1723 (often attrib.: Regency costume).
Etymology: ME f. med.L regentia (as REGENT)
Useful english dictionary. 2012.