The Collaborative International Dictionary of English v.0.48:

Cash \Cash\ (k[a^]sh), n. [F. caisse case, box, cash box, cash.
   See Case a box.]
   A place where money is kept, or where it is deposited and
   paid out; a money box. [Obs.]
   [1913 Webster]

         This bank is properly a general cash, where every man
         lodges his money.                        --Sir W.
                                                  Temple.
   [1913 Webster]

         [pounds]20,000 are known to be in her cash. --Sir R.
                                                  Winwood.
   [1913 Webster]

   2. (Com.)
      (a) Ready money; especially, coin or specie; but also
          applied to bank notes, drafts, bonds, or any paper
          easily convertible into money.
      (b) Immediate or prompt payment in current funds; as, to
          sell goods for cash; to make a reduction in price for
          cash.
          [1913 Webster]

   Cash account (Bookkeeping), an account of money received,
      disbursed, and on hand.

   Cash boy, in large retail stores, a messenger who carries
      the money received by the salesman from customers to a
      cashier, and returns the proper change. [Colloq.]

   Cash credit, an account with a bank by which a person or
      house, having given security for repayment, draws at
      pleasure upon the bank to the extent of an amount agreed
      upon; -- called also bank credit and cash account.

   Cash sales, sales made for ready, money, in distinction
      from those on which credit is given; stocks sold, to be
      delivered on the day of transaction.

   Syn: Money; coin; specie; currency; capital.
        [1913 Webster]

WordNet (r) 3.0 (2006):

cash account
    n 1: an account with a securities brokerage whose transactions
         are settled on a cash basis [ant: margin account]