Hindustani

[hin-doo-stah-nee, -stan-ee] /ˌhɪn dʊˈstɑ ni, -ˈstæn i/
noun
1.
a standard language and lingua franca of northern India based on a dialect of Western Hindi spoken around Delhi.
Abbreviation: Hind.
Compare Hindi (def 2), Urdu.
adjective
2.
of or pertaining to Hindustan, its people, or their languages.
Also, Hindoostani, Hindostani.
Origin
1610-20; < Hindi, Urdu < Persian, equivalent to Hindūstān region of the Indus, Sind (Hindū Hindu + stān country) + suffix of appurtenance
British Dictionary definitions for Hindustani

Hindustani

/ˌhɪndʊˈstɑːnɪ/
noun
1.
the dialect of Hindi spoken in Delhi: used as a lingua franca throughout India
2.
a group of languages or dialects consisting of all spoken forms of Hindi and Urdu considered together
adjective
3.
of or relating to these languages or Hindustan