Source : Webster's Revised Unabridged Dictionary (1913)

Walloons \Wal*loons"\, n. pl.; sing. {Walloon}. [Cf. F. wallon.]
   A Romanic people inhabiting that part of Belgium which
   comprises the provinces of Hainaut, Namur, Li['e]ge, and
   Luxembourg, and about one third of Brabant; also, the
   language spoken by this people. Used also adjectively.
   [Written also Wallons.] ``A base Walloon . . . thrust Talbot
   with a spear.'' --Shak.

   {Walloon guard}, the bodyguard of the Spanish monarch; -- so
      called because formerly consisting of Walloons.

Source : WordNet®

Walloon
     n 1: a member of the French-speaking people living in Belgium
     2: an ethnic group speaking a dialect of French and living in
        southern and eastern Belgium and neighboring parts of
        France
     3: dialect of French spoken in Belgium and adjacent parts of
        France