mass noun
1- a group of mutually intelligible languages and dialects spoken in NW India, principally Hindi and Urdu印度斯坦语（印度西北部一组互通的语言和方言, 主要为印地语和乌尔都语）。
1.1
- the Delhi dialect of Hindi, widely used throughout India as a lingua franca（印地语的）德里方言（在印度作为族际通用语广泛使用）。
- of or relating to the culture of NW India（与）印度西北部文化（有关）的：
Hindustani classical music.
印度西北部古典音乐。
USAGE
Hindustani was the usual term in the 18th and 19th centuries for the native language of NW India. The usual modern term is Hindi (or Urdu in Muslim contexts), although Hindustani is still used to refer to the dialect of Hindi spoken around Delhi, which is widely used throughout India as a lingua franca.