| A | B |
| Tax | Money paid to a ruler or government and spent on providing government services. |
| Fief | Land granted by a lord to his vassal in return for military service. |
| Knight | A warrior of the Middle Ages. |
| Feudalism | The system of mutual rights and duties between lords and vassals. |
| Manor | A large medieval farm. |
| Economy | The way in which natural resources and workers are used to produce goods and services. |
| Serf | A person who lived and worked on a manor. |
| Crusade | A Christian military expedition to take control of the Holy Land from the Muslims. |
| Monastery | Buildings where monks live together. |
| Convent | A building or buildings in which a group of nuns live. |
| Guild | An organization of people in a craft or trade. |
| Monopoly | The exclusive possession or control of a commodity or service. |
| Apprentice | A person learning a trade or an art. |
| Renaissance | The great revival of art and learning in Europe in the 1300s,1400s, and 1500s. It means "a new birth." |
| Explorer | A person who searches for new things and places. |
| Reformation | The religious movement during the 16th century that aimed at reforming the Roman Catholic Church and resulted in establishing the Protestant churches. |
| Divine Right | A belief during the Middle Ages that kings received their powers from God. |