Definition of "Cassiopeia"

(Greek mythology) Proud wife of Cepheus and mother of Andromeda, queen of Ethiopia. When she boasted that her beauty was equal to that of the Nereids, she was punished by Poseidon.

(astronomy) A circumpolar constellation of the northern sky representing Queen Cassiopeia from Greek myth. The constellation lies between Cepheus and Perseus and contains the stars Schedar and Caph.  examples