Pegasean adjective2 •Of or pertaining to the mythical winged horse Pegasus.Descend from Heav'n Urania, by that name / If rightly thou art call'd, whose Voice divine / Following, above th' Olympian Hill I soare, / Above the flight of Pegasean wing. — 1667 •(figurative) Of or pertaining to poetry. formsmore Pegasean · most Pegasean