Ha·run al-Ra·shid or Ha·roun al-Ra·schid 
(hä-rn äl-rä-shēd) also Harun ar-Ra·shid (är′-) 763?-809.
(hä-rn äl-rä-shēd) also Harun ar-Ra·shid (är′-) 763?-809. Fifth Abbasid caliph of Baghdad (786-809) noted for the splendor of his court and his military campaign against the Byzantine Empire.