Definition of the privy purse noun from the Oxford Advanced Learner's Dictionary

 

the privy purse

 noun
noun
BrE
 
; NAmE
 
[singular]
 
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(in Britain) an amount of money that the government gives to the king or queen to pay his or her private expenses plus some official expenses Culture The money comes mainly from the income of the Duchy of Lancaster. The privy purse is separate from the Civil List, which pays for other official expenses of the whole royal family.