rebate (n.) Look up rebate at Dictionary.com
1650s, from rebate (v.).
rebate (v.) Look up rebate at Dictionary.com
late 14c., "to reduce;" early 15c., "to deduct, subtract," from Old French rabattre "beat down, drive back," also "deduct," from re- "repeatedly" (see re-) + abattre "beat down" (see abate). Meaning "to pay back (a sum) as a rebate" is from 1957. Related: Rebated; rebating.