(Greek mythology) A winged horse fabled to have sprung from the blood of Medusa when she was slain. He is noted for causing, with a blow of his hoof, Hippocrene, the inspiring fountain of the Muses, to spring from Mount Helicon. Bellerophon tamed and rode upon Pegasus when he defeated the Chimaera.

(historical) A coin of ancient Corinth, with a winged horse depicted on the obverse.

A winged horse (imaginary or mythical, sometimes figurative).

plural of pegasus