Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. To heap or pile up; as, to bank sand.

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

   {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.

Banking \Bank"ing\, n.
   The business of a bank or of a banker.

   {Banking house}, an establishment or office in which, or a
      firm by whom, banking is done.

Source : WordNet®

banking
     n 1: engaging in the business of banking; maintaining savings and
          checking accounts and issuing loans and credit etc.
     2: transacting business with a bank; depositing or withdrawing
        funds or requesting a loan etc.