The Collaborative International Dictionary of English v.0.48:

Lend \Lend\ (l[e^]nd), v. t. [imp. & p. p. Lent (l[e^]nt); p.
   pr. & vb. n. Lending.] [OE. lenen, AS. l[=ae]nan, fr.
   l[=ae]n loan; akin to G. lehnen to lend. See Loan.]
   1. To allow the custody and use of, on condition of the
      return of the same; to grant the temporary use of; as, to
      lend a book; -- opposed to borrow.
      [1913 Webster]

            Give me that ring.
            I'll lend it thee, my dear, but have no power
            To give it from me.                   --Shak.
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   2. To allow the possession and use of, on condition of the
      return of an equivalent in kind; as, to lend money or some
      article of food.
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            Thou shalt not give him thy money upon usury, nor
            lend him thy victuals for increase.   --Levit. xxv.
                                                  37.
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   3. To afford; to grant or furnish in general; as, to lend
      assistance; to lend one's name or influence.
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            Cato, lend me for a while thy patience. --Addison.
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            Mountain lines and distant horizons lend space and
            largeness to his compositions.        --J. A.
                                                  Symonds.
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   4. To let for hire or compensation; as, to lend a horse or
      gig.
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   Note: This use of the word is rare in the United States,
         except with reference to money.
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   To lend a hand, to give assistance; to help. [Colloq.]

   To lend one's ears or To lend an ear, to give attention.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lend
    v 1: bestow a quality on; "Her presence lends a certain cachet
         to the company"; "The music added a lot to the play"; "She
         brings a special atmosphere to our meetings"; "This adds a
         light note to the program" [syn: lend, impart,
         bestow, contribute, add, bring]
    2: give temporarily; let have for a limited time; "I will lend
       you my car"; "loan me some money" [syn: lend, loan] [ant:
       borrow]
    3: have certain characteristics of qualities for something; be
       open or vulnerable to; "This story would lend itself well to
       serialization on television"; "The current system lends
       itself to great abuse"

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "lend":
   accommodate, accommodate with, add, advance, allow, bestow, borrow,
   confer, contribute, discount, discount notes, fit, float a loan,
   furnish, give, impart, lease-lend, lend-lease, loan, loan-shark,
   negotiate a loan, oblige, shave, suit