Source : Webster's Revised Unabridged Dictionary (1913)

Hindoo \Hin"doo\, Hindu \Hin"du\ (?; 277), n.; pl. {Hindoos}or
   {Hindus}. [Per. Hind[=u], fr. Hind, Hind[=u]st[=a]n, India.
   Cf. {Indian}.]
   A native inhabitant of Hindostan. As an ethnical term it is
   confined to the Dravidian and Aryan races; as a religious
   name it is restricted to followers of the Veda.

Hindu \Hin"du\, n.
   Same as {Hindoo}.

Source : WordNet®

Hindu
     n 1: a native or inhabitant of Hindustan or India [syn: {Hindoo},
           {Hindustani}]
     2: a person who adheres to Hinduism [syn: {Hindoo}]

Hindu
     adj : of or relating to or supporting Hinduism; "the Hindu faith"
           [syn: {Hindi}, {Hindoo}]