Wiktionary
ustad
n. a master, especially of music, in South Asia and Middle East
Wikipedia
Ustad
Ustād or Usthad or Ustāth (abbreviated as Ust., Ut. or Ud.; from Persian , Armenian:Ուստա) is an honorific title for a man used in the Middle East, South Asia and Southeast Asia. It is used in various languages of the Muslim world, including Arabic, Armenian, Persian, Urdu, Punjabi, Pashto, Turkish, and Kurdish languages.
Usage examples of "ustad".
LP of a sitar player named Ustad Vilayat Khan, with his brother - a younger brother, to judge from the picture - on the veena, and an unnamed tabla player.