I. noun — [ mass noun] 1. a monotheistic religion founded in the 19th century as a development of Babism, emphasizing the essential oneness of humankind and of all religions and seeking world peace. The Baha’i faith was founded by the Persian Baha’ullah (1817–92) and his son Abdul Baha (1844–1921). 2. [ count noun] — an adherent of the Baha’i faith. II. derivatives Baha’ism /bɑːˈhɑːɪz(ə)m / noun
– origin Persian, from Arabic bahā’ ‘splendour’.