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).
The deposit already formed affording to the
succeeding portion of the charged fluid a basis.
2. (Mining) A natural occurrence of a useful mineral under
the conditions to invite exploitation. --Raymond.
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.
(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
5. A place of deposit; a depository. [R.]
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.