(i) An account into which a fixed amount of money is placed for
the purpose of making change or minor disbursements.
(ii) An imprest account is one that always has the same balance;
an exact amount of cash in deposited into the account for a known
specific future purpose (such as an upcoming payroll), and the same
amount leaves the account when the funds for that purpose are
expended.
(iii) In the United Kingdom, a record of the transactions of a
type of petty cash system. An employee is given an advance of
money, an imprest, for incidental expenses and, when most of it has
been spent, he or she presents receipts for the expenses to the
accounts department and is then reimbursed with cash to the total
value of the receipts.