A winged horse that sprang from the blood of Medusa when Perseus cut off her head.
A large northern constellation, said to represent a winged horse. The three brightest stars, together with one star of Andromeda, form the prominent Square of Pegasus.
nounplural noun Pegasi
An imaginary animal in the form of a winged horse.
- ‘at the end of the book he gets eaten by a dragon when he's trying to ride a Pegasus’
postpositive Used with preceding Greek letter or numeral to designate a star in the constellation Pegasus.
- ‘the star Zeta Pegasi’
Via Latin from Greek. Pegasi is the Latin genitive form of Pegasus.