Definition of County Palatine in English:

County Palatine

noun

historical
  • (in England and Ireland) a county in which royal privileges and exclusive rights of jurisdiction were held by its earl or lord.

    ‘Families of quality whose homes graced the parklands of the County Palatine had their city homes in Chester.’
    • ‘Map of the County Palatine of Lancaster.’
    • ‘A similar position is found in the Principality and County Palatine of Durham.’
    • ‘Corporate colonies and Counties Palatine were converted into States.’
    • ‘England also isolated its main jurisdictions from frontier wars by making hinterlands such as Wales and Durham Counties Palatine, which again operated without much interference from royal and other franchise courts.’

Origin