The Collaborative International Dictionary of English v.0.48:

Bank \Bank\, v. t. [imp. & p. p. Banked(b[a^][ng]kt); p. pr. &
   vb. n. Banking.]
   1. To raise a mound or dike about; to inclose, defend, or
      fortify with a bank; to embank. "Banked well with earth."
      --Holland.
      [1913 Webster]

   2. To heap or pile up; as, to bank sand.
      [1913 Webster]

   3. To pass by the banks of. [Obs.] --Shak.
      [1913 Webster]

   4. (Engineering) To build (a roadway or railroad) with an
      inclination at a curve in the road, so as to counteract
      centrifugal forces acting on vehicles moving rapiudly
      around the curve, thus reducing the danger of vehicles
      overturning at a curve; as, the raceway was steeply banked
      at the curves.
      [PJC]

   To bank a fire, To bank up a fire, to cover the coals or
      embers with ashes or cinders, thus keeping the fire low
      but alive.
      [1913 Webster]