Source : Webster's Revised Unabridged Dictionary (1913)

Girondist \Gi*ron"dist\, n. [F. Girondiste.]
   A member of the moderate republican party formed in the
   French legislative assembly in 1791. The Girondists were so
   called because their leaders were deputies from the
   department of La Gironde.

Girondist \Gi*ron"dist\, a.
   Of or pertaining to the Girondists. [Written also
   {Girondin}.]

Source : WordNet®

Girondist
     n : a member of the moderate republican party during the French
         Revolution; the Girondists were overthrown by their more
         radical rivals the Jacobins