overdraft - definition and synonyms

noun [countable] 

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  1. an agreement with your bank that allows you to spend money when you have no money left in your account
    overdraft limit (=the amount of money that your bank will allow you to spend over the amount that you really have):

    Hefty fines are payable for those who exceed their overdraft limit.

    1. a.
      the amount of money that someone owes their bank because they have used this agreement
      have an overdraft:

      I’ve got an £80 overdraft at the moment.