| Noun | 1. | Pegasus - (Greek mythology) the immortal winged horse that sprang from the blood of the slain Medusa; was tamed by Bellerophon with the help of a bridle given him by Athena; as the flying horse of the Muses it is a symbol of highflying imaginationGreek mythology - the mythology of the ancient Greeks |
| 2. | Pegasus - a constellation in the northern hemisphere near Andromeda and Pisces |