Quietus

In old English law

Quit; acquitted; discharged. A word used by the clerk of the pipe, and auditors in the exchequer, in their acquittances or discharges given to accountants; usually concluding with an abinde recessit quietus, (hath gone quit thereof,) which was called a "quietus est."

Cowell.

In modern law, the word denotes an acquittance or discharge; as of an executor or administrator, (White v. Ditson, 140 Mass. 351, 4 N. E. 606, 54 Am. Rep. 473,) or of a judge or attorney general, (3 Mod. 99.)