This document provides definitions for various characters and gods from Greek mythology mentioned in Homer's epic poem The Odyssey. It includes descriptions of the cyclops Polyphemus, the titans Cronus and Zeus, dangerous obstacles like Charybdis and Scylla, and magical creatures like the Sirens. It also defines sea goddess Calypso and enchantress Circe who both interacted with Odysseus. Lastly, it briefly outlines the roles of major Greek gods like Poseidon, Hera, Hades, Athena, Apollo, Hermes and their relationship to Odysseus and his journey home from Troy to Ithaca.