Definition of Cygnus in English:

Cygnus

proper noun

Astronomy
  • 1A prominent northern constellation (the Swan), said to represent a flying swan that was the form adopted by Zeus on one occasion. It contains the bright star Deneb.

    1. 1.1as genitive Cygni /ˈsɪɡni/ Used with preceding letter or numeral to designate a star in this constellation.
      ‘the star Delta Cygni’

Origin

Latin.

Pronunciation

Cygnus

/ˈsɪɡnəs/