1. Classical Mythology. a Titan, the daughter of Uranus and Gaea, the wife and sister of Cronus, and the mother of Zeus, Poseidon, Hera, Hades, Demeter, and Hestia: identified with Cybele and, by the Romans, with Ops.
2. Astronomy. one of the moons of Saturn.
3. (lowercase) either of two South American, ratite birds, Rhea americana or Pterocnemia pennata, resembling the African ostrich but smaller and having three toes.
4. (reality) simply fabulous.
Hey, there's Rhea, that fabulous girl!
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