The Collaborative International Dictionary of English v.0.48:

Few \Few\ (f[=u]), a. [Compar. Fewer (f[=u]"[~e]r); superl.
   Fewest.] [OE. fewe, feawe, AS. fe['a], pl. fe['a]we; akin
   to OS. f[=a]h, OHG. f[=o] fao, Icel. f[=a]r, Sw. f[*a], pl.,
   Dan. faa, pl., Goth. faus, L. paucus, cf. Gr. pay^ros. Cf.
   Paucity.]
   Not many; small, limited, or confined in number; --
   indicating a small portion of units or individuals
   constituting a whole; often, by ellipsis of a noun, a few
   people. "Are not my days few?" --Job x. 20.
   [1913 Webster]

         Few know and fewer care.                 --Proverb.
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   Note: Few is often used partitively; as, few of them.
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   A few, a small number.

   In few, in a few words; briefly. --Shak.

   No few, not few; more than a few; many. --Cowper.

   The few, the minority; -- opposed to the many or the
      majority.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fewer
    adj 1: (comparative of `few' used with count nouns) quantifier
           meaning a smaller number of; "fewer birds came this
           year"; "the birds are fewer this year"; "fewer trains
           were late" [ant: more(a)]