Jalal ad-Din ar-RumiPronunciation: /dʒəˌlal adˌdɪn ɑːˈruːmi/Definition of Jalal ad-Din ar-Rumi (1207–73), Persian poet and Sufi mystic, founder of the order of whirling dervishes; also called Mawlana. Jalal ad-Din ar-Rumi in other Oxford dictionaries Definition of Jalal ad-Din ar-Rumi in the US English dictionary