Noun
(India, historical) A province of the Mughal Empire.
(India, historical) Synonym of subadar (“the governor or commander in charge of a subah; a viceroy”)
Source: en.wiktionary.orgAmitabh Bachchan humoured his fan, but provided him with an honest response, "Arre yaar subah subah shubh shubh bolo (Arre yaar, begin the morning with something positive)." Source: Internet