Bengali (Adjective) — Of or relating to or characteristic of Bengal or its people. ex. "Bengali hills"
Bengali (Noun) — A Magadhan language spoken by the Bengali people; the official language of Bangladesh and Bengal.
Bengali (Noun) — (Hinduism) a member of a people living in Bangladesh and West Bengal (mainly Hindus).
Bengali (Noun) — An ethnic group speaking Bengali and living in Bangladesh and eastern India.