crown office

1 :  the office of the Court of King's Bench in English law in which certain procedure formerly took place on the criminal-law side and in matters relating to the prerogative writs of quo warranto, mandamus, and prohibition

2 :  a department for the King's Bench division in the central office of the High Court of Justice in English law

3 in English law a :  the Chancery Office in which the great seal is generally affixed b :  the former office of the common-law side of the Chancery Court