The Collaborative International Dictionary of English v.0.48:

Borrow \Bor"row\, v. t. [imp. & p. p. Borrowed; p. pr. & vb.
   n. Borrowing.] [OE. borwen, AS. borgian, fr. borg, borh,
   pledge; akin to D. borg, G. borg; prob. fr. root of AS.
   beorgan to protect. ?95. See 1st Borough.]
   1. To receive from another as a loan, with the implied or
      expressed intention of returning the identical article or
      its equivalent in kind; -- the opposite of lend.
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   2. (Arith.) To take (one or more) from the next higher
      denomination in order to add it to the next lower; -- a
      term of subtraction when the figure of the subtrahend is
      larger than the corresponding one of the minuend.
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   3. To copy or imitate; to adopt; as, to borrow the style,
      manner, or opinions of another.
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            Rites borrowed from the ancients.     --Macaulay.
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            It is not hard for any man, who hath a Bible in his
            hands, to borrow good words and holy sayings in
            abundance; but to make them his own is a work of
            grace only from above.                --Milton.
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   4. To feign or counterfeit. "Borrowed hair." --Spenser.
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            The borrowed majesty of England.      --Shak.
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   5. To receive; to take; to derive.
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            Any drop thou borrowedst from thy mother. --Shak.
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   To borrow trouble, to be needlessly troubled; to be
      overapprehensive.
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WordNet (r) 3.0 (2006):

borrowing
    n 1: the appropriation (of ideas or words etc) from another
         source; "the borrowing of ancient motifs was very apparent"
         [syn: borrowing, adoption]
    2: obtaining funds from a lender

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "borrowing":
   accounts payable, accounts receivable, amount due, appropriation,
   autoplagiarism, bad debts, bill, bills, borrowed word, calque,
   charges, cheap money, chits, cribbing, debt, discounting, due,
   dues, financial commitment, floating debt, foreignism, funded debt,
   indebtedness, indebtment, infringement of copyright, lending,
   liability, literary piracy, loan translation, loan word, maturity,
   money market, national debt, note discounting, note shaving,
   obligation, outstanding debt, paronym, piracy, plagiarism,
   plagiarizing, plagiary, pledge, public debt, score, tight money,
   uncollectibles, unfulfilled pledge