/ Dictionary / Index C Cygnus: Meaning and Definition of Find definitions for: Cyg•nus Pronunciation: (sig'nus), [key] — gen. -ni the Swan, a northern constellation southwest of Draco, containing the bright star Deneb. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cygnus (Thesaurus) cygnet Cygnus A Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language