 The word Bahá 'í is used either as an adjective to refer to the Bahá 'í Faith or as a term for a follower of Bahá 'u'lláh . The word is not a noun meaning the religion as a whole . It is derived from the Arabic Bahá ' ( بهاء ) , meaning " glory " or " splendor " . The term " <unk> " ( or " Baha 'ism " ) is still used , mainly in a pejorative sense . 
