What does it mean?

Fief
(Latin: feudum) was the central element of feudalism and consisted of heritable property or rights granted by an overlord to a vassal who held it in fealty (or "in fee") in return for a form of feudal allegiance and service, usually given by the personal ceremonies of homage and fealty. The fees were often lands or revenue-producing real property held in feudal land tenure: these are typically known as fiefs or fiefdoms. However, not only land but anything of value could be held in fee, including governmental office, rights of exploitation such as hunting or fishing, monopolies in trade, and tax farms.

Lord
Under the feudal system, the term lord had a wide, loose and varied meaning. An overlord was a person from whom a landholding or a manor was held by a mesne lord or vassal under various forms of feudal land tenure. The modern term landlord is a vestigial survival of this function. A liege lord was a person to whom a vassal owed sworn allegiance. Neither of these terms were titular dignities, but rather factual appellations, which described the relationship between two or more persons within the highly stratified feudal social system. For example, a man might be Lord of the Manor to his own tenants but also a vassal of his own overlord, who in turn was a vassal of the King. Where a knight was a lord of the manor, he was referred to in contemporary documents as "John (Surname), knight, lord of (manor name)". A feudal baron was a true titular dignity, with the right to attend Parliament, but a feudal baron, Lord of the Manor of many manors, was a vassal of the King.


Sheriff
was the oldest secular office under the Crown. Formerly the Sheriff was the principal law enforcement officer in the county but over the centuries most of the responsibilities associated with the post have been transferred elsewhere or are now defunct, so that its functions are now largely ceremonial.


Steward (office)
was an official who was appointed by the legal ruling monarch to represent them in a country and who may have a mandate to govern it in their name. In medieval times, the steward was initially a servant who supervised both the lord's estate and his household. However over the course of the next century, other household posts arose and involved more responsibilities. This meant that in the 13th century, there were commonly two stewards in each house—one who managed the estate and the other, the majordomo, to manage domestic routine. Stewards commonly earned up to 3 to 4 pounds per year. Stewards took care of their lord's castles when they were away. Also, stewards checked on the taxes of the serfs on his lord's manor.


Yeoman
was a social class in England from the Elizabethan era (1558–1603) to the 18th century of a free man, who owned his own land (farm). Their wealth and the size of their landholding varied. Many yeomen were prosperous, and wealthy enough to employ servants and farm labourers. Some were as wealthy as the minor county or regional landed gentry and some even leased land to gentleman landowners. Some could be classed as gentlemen, but did not aspire to this status: it was cheaper to remain a yeoman. Often it was hard to distinguish minor landed gentry from the wealthier yeomen, and wealthier husbandmen from the poorer yeomen.