The Collaborative International Dictionary of English v.0.48:

Quaint \Quaint\, a. [OE. queint, queynte, coint, prudent, wise,
   cunning, pretty, odd, OF. cointe cultivated, amiable,
   agreeable, neat, fr. L. cognitus known, p. p. of cognoscere
   to know; con + noscere (for gnoscere) to know. See Know,
   and cf. Acquaint, Cognition.]
   1. Prudent; wise; hence, crafty; artful; wily. [Obs.]
      [1913 Webster]

            Clerks be full subtle and full quaint. --Chaucer.
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   2. Characterized by ingenuity or art; finely fashioned;
      skillfully wrought; elegant; graceful; nice; neat.
      [Archaic] " The queynte ring." " His queynte spear."
      --Chaucer. " A shepherd young quaint." --Chapman.
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            Every look was coy and wondrous quaint. --Spenser.
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            To show bow quaint an orator you are. --Shak.
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   3. Curious and fanciful; affected; odd; whimsical; antique;
      archaic; singular; unusual; as, quaint architecture; a
      quaint expression.
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            Some stroke of quaint yet simple pleasantry.
                                                  --Macaulay.
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            An old, long-faced, long-bodied servant in quaint
            livery.                               --W. Irving.
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   Syn: Quaint, Odd, Antique.

   Usage: Antique is applied to that which has come down from
          the ancients, or which is made to imitate some ancient
          work of art. Odd implies disharmony, incongruity, or
          unevenness. An odd thing or person is an exception to
          general rules of calculation and procedure, or
          expectation and common experience. In the current use
          of quaint, the two ideas of odd and antique are
          combined, and the word is commonly applied to that
          which is pleasing by reason of both these qualities.
          Thus, we speak of the quaint architecture of many old
          buildings in London; or a quaint expression, uniting
          at once the antique and the fanciful.
          [1913 Webster]

WordNet (r) 3.0 (2006):

quaint
    adj 1: strange in an interesting or pleasing way; "quaint
           dialect words"; "quaint streets of New Orleans, that most
           foreign of American cities"
    2: very strange or unusual; odd or even incongruous in character
       or appearance; "the head terminating in the quaint duck bill
       which gives the animal its vernacular name"- Bill Beatty;
       "came forth a quaint and fearful sight"- Sir Walter Scott; "a
       quaint sense of humor"
    3: attractively old-fashioned (but not necessarily authentic);
       "houses with quaint thatched roofs"; "a vaulted roof
       supporting old-time chimney pots" [syn: old-time, quaint,
       olde worlde]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "quaint":
   absurd, acquaint, amusing, antiquated, antique, archaic, bizarre,
   curious, droll, eccentric, fanciful, fantastic, freaked out,
   freaky, funny, hilarious, humorous, idiosyncratic, incongruous,
   kooky, laughable, ludicrous, odd, oddball, off, off the wall,
   offbeat, old-fashioned, out, outlandish, passing strange, peculiar,
   picturesque, present, priceless, queer, quizzical, rich,
   ridiculous, risible, screaming, singular, strange, uncommon,
   unconventional, unearthly, unorthodox, unusual, weird, whimsical,
   witty, wondrous strange