Source : Webster's Revised Unabridged Dictionary (1913)

Hindi \Hin"di\, n. [Prop. a Per. adj. meaning, Indian, Hindoo.]
   The name given by Europeans to that form of the Hindustani
   language which is chiefly spoken by native Hindoos. In
   employs the Devanagari character, in which Sanskrit is
   written. --Whitworth.

Source : WordNet®

Hindi
     adj : of or relating to or supporting Hinduism; "the Hindu faith"
           [syn: {Hindu}, {Hindoo}]
     n : the most widely spoken of modern Indic vernaculars; spoken
         mostly in the north of India; along with English it is
         the official language of India; usually written in
         Devanagari script