| Term | Definition |
| Oedipus | King of Thebes, flees Corinth to escape phrophecy |
| Laius | Former king of Thebes, Killed by Oedipus |
| Creon | Oedipus' brother-in-law and uncle |
| Jocasta | Oedipus' mother and wife |
| Teiresias | Old blind prophet of Thebes |
| Polybus | King of Corinth |
| Merope | Queen of Corinth |
| Corinth | Oedipus' childhood home |
| Thebes | A plague is on this city; Oedipus is king here |
| Oracle at Delphi | Creon is sent here to learn how to lift the plague |
| Apollo | This god's oracle is at Delphi |
| Cithaeron | Oedipus is brought here as an infant |
| Sphinx | This riddling monster has wings and a lion's body |