| Term | Definition |
| Julius Caesar | Roman general who said, " vini, vidi, vici" and was declared dictator for life. Caesar was killed by senators including his friend Brutus. |
| Octavian/Augustus | Caesar's adopted son who became the first Roman emperor. The senate changed his name to Augustus or "respected one." |
| Mark Antony | A Roman general who came to rule in the east. He had an affair with Cleopatra and ended up killing himself. |
| Cleopatra | The queen of Egypt and lover of Caesar and Mark Antony. She killed herself by letting a poisonous snake bite her. |
| Brutus | A Roman senator and friend of Caesar who ended up killing Caesar. |
| empire | An empire exists when one group rules over another |
| emperor | A ruler of an empire |
| triumvirate | A group of three rulers |