Mont·gol·fier 
(mŏnt-gŏlfē-ər, môɴ-gôl-fyā), Joseph Michel 1740-1810.
(mŏnt-gŏlfē-ər, môɴ-gôl-fyā), Joseph Michel 1740-1810. French aeronautic inventor who with his brother Jacques Étienne (1745-1799) built and ascended in the first practical hot-air balloon (1783).