| Term | Definition |
| Athens | A city-state in ancient Greece; the capital of modern-day Greece. |
| agora | A public market and meeting place in an ancient Greek city; the Agora, spelled with a capital 'A', refers to the agora of Athens. |
| vendor | A seller of goods. |
| slavery | Condition of being owned by, and forced to work for, someone else. |
| Sparta | A city-state in ancient Greece. |
| helots | In ancient Sparta, the term for slaves who were owned by the state. |
| Peloponnesian War | A war fought between Athens and Sparta in ancient Greece; almost every other Greek city-state was involved in the war. |
| plague | A widespread disease. |
| blockade | An action taken to isolate the enemy and cut off its supplies. |
| assassinate | To murder someone for political reasons. |
| barbarian | A person who belongs to a group that others consider wild, or uncivilized. |
| Alexander the Great | King of Macedonia (in Greece); he conquered Persia and Egypt and invaded India. |
| Hellenistic | Describes Greek history or culture after the death of Alexander the Great, including the three main kingdoms formed by the breakup of Alexander's empire. |