(in England and Wales) the principal Justice of the Peace of a county, who has nominal custody of the records of the commission of the peace. The function is usually fulfilled by the Lord Lieutenant.
（英格兰和威尔士的）郡首席治安法官
Example sentencesExamples
The importance of the offices of lord lieutenant and custos rotulorum lay beyond the nature of their immediate functions.
The custos rotulorum also appointed the clerk of the peace, who advised the justices on legal matters beyond the scope of the quorum.
The play begins with Justice Shallow aggrieved by Falstaff and his men; accompanied by his cousin Slender, he explains to Sir Hugh Evans, a Welsh parson, how he will take the matter to the highest court (the Star Chamber), and declines his ranks and titles (including keeper of the rolls, custos rotulorum).