n. (pl. -ies) 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).
[ ME f. med.L regentia (as REGENT) ]