Commissioner in the Parliament of Scotland

A commissioner was a legislator appointed or elected to represent a royal burgh or shire in the Parliament of Scotland and the associated Convention of the Estates. Member of Parliament (MP) and Deputy are equivalent terms in other countries. The Scottish Parliament (also known as the Three Estates) and the Convention of the Estates were unicameral legislatures, so commissioners sat alongside prelates (the first estate) and members of the nobility (the second estate).