D defs.my
Entry 2 senses Webster, 1913

kickback

/kĭk'-băkˌ/ · kick·back · IPA /ˈkɪkbæk/
01 n. recoil, of a gun or machine, as in older automobile engines when started by turning a crank.
  1. 1.
    recoil, of a gun or machine, as in older automobile engines when started by turning a crank.
  2. 2.
    A secret, and usually illegal, payment, by a recipient of money paid for goods or services, to a facilitator of the transaction, of a portion of that money;