The Collaborative International Dictionary of English v.0.48:

Afford \Af*ford"\ ([a^]f*f[=o]rd"), v. t. [imp. & p. p.
   Afforded; p. pr. & vb. n. Affording.] [OE. aforthen, AS.
   gefor[eth]ian, for[eth]ian, to further, accomplish, afford,
   fr. for[eth] forth, forward. The prefix ge- has no well
   defined sense. See Forth.]
   1. To give forth; to supply, yield, or produce as the natural
      result, fruit, or issue; as, grapes afford wine; olives
      afford oil; the earth affords fruit; the sea affords an
      abundant supply of fish.
      [1913 Webster]

   2. To give, grant, or confer, with a remoter reference to its
      being the natural result; to provide; to furnish; as, a
      good life affords consolation in old age.
      [1913 Webster]

            His tuneful Muse affords the sweetest numbers.
                                                  --Addison.
      [1913 Webster]

            The quiet lanes . . . afford calmer retreats.
                                                  --Gilpin.
      [1913 Webster]

   3. To offer, provide, or supply, as in selling, granting,
      expending, with profit, or without loss or too great
      injury; as, A affords his goods cheaper than B; a man can
      afford a sum yearly in charity.
      [1913 Webster]

   4. To incur, stand, or bear without serious detriment, as an
      act which might under other circumstances be injurious; --
      with an auxiliary, as can, could, might, etc.; to be able
      or rich enough.
      [1913 Webster]

            The merchant can afford to trade for smaller
            profits.                              --Hamilton.
      [1913 Webster]

            He could afford to suffer
            With those whom he saw suffer.        --Wordsworth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

afford
    v 1: be able to spare or give up; "I can't afford to spend two
         hours with this person"
    2: be the cause or source of; "He gave me a lot of trouble";
       "Our meeting afforded much interesting information" [syn:
       yield, give, afford]
    3: have the financial means to do something or buy something;
       "We can't afford to send our children to college"; "Can you
       afford this car?"
    4: afford access to; "the door opens to the patio"; "The French
       doors give onto a terrace" [syn: afford, open, give]