|1.||a refund of a fraction of the amount payable or paid, as for goods purchased in quantity; discount|
|2.||to deduct (a part) of a payment from (the total)|
|3.||archaic to reduce or diminish (something or the effectiveness of something)|
|[C15: from Old French rabattre to beat down, hence reduce, deduct, from |
The return of part of a payment for a good. Unlike a discount, which is deducted from the price before purchase, a rebate is returned after purchase.