The Collaborative International Dictionary of English v.0.48:

Deposit \De*pos"it\, n. [L. depositum, fr. depositus, p. p. of
   deponere: cf. F. d['e]p[^o]t, OF. depost. See Deposit, v.
   t., and cf. Depot.]
   1. That which is deposited, or laid or thrown down; as, a
      deposit in a flue; especially, matter precipitated from a
      solution (as the siliceous deposits of hot springs), or
      that which is mechanically deposited (as the mud, gravel,
      etc., deposits of a river).
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            The deposit already formed affording to the
            succeeding portion of the charged fluid a basis.
                                                  --Kirwan.
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   2. (Mining) A natural occurrence of a useful mineral under
      the conditions to invite exploitation. --Raymond.
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   3. That which is placed anywhere, or in any one's hands, for
      safe keeping; something intrusted to the care of another;
      esp., money lodged with a bank or banker, subject to
      order; anything given as pledge or security.
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   4. (Law)
      (a) A bailment of money or goods to be kept gratuitously
          for the bailor.
      (b) Money lodged with a party as earnest or security for
          the performance of a duty assumed by the person
          depositing.
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   5. A place of deposit; a depository. [R.]
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   Bank of deposit. See under Bank.

   In deposit, or On deposit, in trust or safe keeping as a
      deposit; as, coins were received on deposit.
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