noun.
In British India: Subsistence-money given to soldiers, witnesses, prisoners, and others. An allowance in addition to their pay originally made to troops serving in the field.
noun.
In British India, agio; discount; difference of exchange.
the GNU version of the Collaborative International Dictionary of English
noun.
Extra pay; esp. an extra allowance to an English officer serving in India.
noun.
Rate of exchange; also, the discount on uncurrent coins.
"It may be doubted whether one of these retrenchments, involving a strict revision of officers 'allowances known as "batta," was considerable enough to be worth the almost mutinous discontent which it provoked."