| A | B |
| Middle Ages | A period between A.D. 500 to 1500 |
| medieval | Latin words meaning "middle age" |
| topography | physical features of the Earth's surface |
| clergy | group of people who are trained and ordained for religious services |
| monastery | a secluded community where men called monks focus on prayer and scripture. |
| convent | a religious community for women known as nuns. |
| pagan | follower of a polytheistic religion, or a religion with more than one god. |
| missionary | person who tries to convert others to a particular religion. |
| saint | an especially holy person |
| sacraments | the sacred rites of the Christian Church, such as baptism and communion |
| Christendom | the large community of Christians spread across the world |
| vassals | lesser lords that pledged their service and loyalty to a more powerful lord in return for land |
| fief | an estate granted to a vassal in the European feudal system |
| knights | warriors mounted on horseback |
| chivalry | code of conduct that knights lived by requiring them to be brave, loyal, and generous. |
| manor | the agricultural estate of a medieval lord |
| serfs | peasants who were legally bound to the lord's land. |