Pronunciation: (kik'bak"),[key] —n. 1. a percentage of income given to a person in a position of power or influence as payment for having made the income possible: usually considered improper or unethical.
2. a rebate, usually given secretively by a seller to a buyer or to one who influenced the buyer.
3. the practice of an employer or a person in a supervisory position of taking back a portion of the wages due workers.
4. a response, usually vigorous.
5. a sudden, uncontrolled movement of a machine, tool, or other device, as on starting or in striking an obstruction: A kickback from a chain saw can be dangerous.