n.
A group of Indic dialects including the spoken form of Hindi-Urdu that function as a lingua franca throughout much of northern and central India.
adj.
Of or relating to Hindustan, its people, or the Hindustani language.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.