NOUN (2)

1. engaging in the business of keeping money for savings and checking accounts or for exchange or for issuing loans and credit etc.;

2. transacting business with a bank; depositing or withdrawing funds or requesting a loan etc.;

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]

The Collaborative International Dictionary of English v.0.48:

Banking \Bank"ing\, n.
   The business of a bank or of a banker.
   [1913 Webster]

   Banking house, an establishment or office in which, or a
      firm by whom, banking is done.
      [1913 Webster] banknote

WordNet (r) 3.0 (2006):

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

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "banking":
   acrobatics, aerobatics, chandelle, crabbing, dive, diving,
   fishtailing, glide, investment banking, money changing,
   money dealing, nose dive, power dive, pull-up, pullout, pushdown,
   rolling, sideslip, spiral, stall, stunting, tactical maneuvers,
   volplane, zoom