Source : Webster's Revised Unabridged Dictionary (1913)

Progressive party \Progressive party\ (U. S. Politics)
   The political party formed, chiefly out of the Republican
   party, by the adherents of Theodore Roosevelt in the
   presidential campaign of 1912. The name Progressive party was
   chosen at the meeting held on Aug. 7, 1912, when the
   candidates were nominated and the platform adopted. Among the
   chief articles in the platform are those demanding direct
   primaries, preferential primaries for presidential
   nominations, direct election of United States senators,
   women's suffrage, and recall of judicial decisions in certain
   cases.

Source : WordNet®

Progressive Party
     n : a former political party in the United States; founded by
         Theodore Roosevelt during the presidential campaign of
         1912; its emblem was a picture of a bull moose [syn: {Bull
         Moose Party}]