The Collaborative International Dictionary of English v.0.48:

Cashier \Cash*ier"\ (k[a^]sh*[=e]r"), n. [F. caissier, fr.
   caisse. See Cash.]
   One who has charge of money; a cash keeper; the officer who
   has charge of the payments and receipts (moneys, checks,
   notes), of a bank or a mercantile company.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cashier \Cash*ier"\, v. t. [imp. & p. p. Cashiered; p. pr. &
   vb. n. Cashiering.] [Earlier cash, fr. F. casser to break,
   annul, cashier, fr. L. cassare, equiv. to cassum reddere, to
   annul; cf. G. cassiren. Cf. Quash to annul, Cass.]
   1. To dismiss or discard; to discharge; to dismiss with
      ignominy from military service or from an office or place
      of trust.
      [1913 Webster]

            They have cashiered several of their followers.
                                                  --Addison.
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            He had insolence to cashier the captain of the lord
            lieutenant's own body guard.          --Macaulay.
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   2. To put away or reject; to disregard. [R.]
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            Connections formed for interest, and endeared
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            By selfish views, [are] censured and cashiered.
                                                  --Cowper.
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            They absolutely cashier the literal express sense of
            the words.                            --Sowth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cashier
    n 1: an employee of a bank who receives and pays out money [syn:
         teller, cashier, bank clerk]
    2: a person responsible for receiving payments for goods and
       services (as in a shop or restaurant)
    v 1: discard or do away with; "cashier the literal sense of this
         word"
    2: discharge with dishonor, as in the army