Definition of Cassiopeia in US English:


proper noun

  • 1Greek Mythology
    The wife of Cepheus, king of Ethiopia, and mother of Andromeda.

  • 2Astronomy
    A constellation near the north celestial pole, recognizable by the conspicuous “W” pattern of its brightest stars.

    1. 2.1as genitive Cassiopeiae /ˌkasēəˈpē-ē/ Used with preceding letter or numeral to designate a star in the constellation Cassiopeia.
      ‘the star Delta Cassiopeiae’