The Collaborative International Dictionary of English v.0.48:

Bengalee \Ben*gal"ee\, Bengali \Ben*gal"i\, prop. n.
   The language spoken in Bengal.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bengali \Bengali\ prop. adj.
   1. Of or pertaining to the Bengali language; as, Bengali
      poetry.
      [WordNet 1.5]

   2. Of, pertaining to, or characteristic of Bangladesh
      (formerly Bengal) or its inhabitants; as, Bengali hills.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

Bengali
    adj 1: of or relating to or characteristic of Bengal or its
           people; "Bengali hills"
    n 1: (Hinduism) a member of a people living in Bangladesh and
         West Bengal (mainly Hindus)
    2: an ethnic group speaking Bengali and living in Bangladesh and
       eastern India
    3: a Magadhan language spoken by the Bengali people; the
       official language of Bangladesh and Bengal [syn: Bengali,
       Bangla]