'Populism' definitions:

Definition of 'populism'

From: WordNet
noun
The political doctrine that supports the rights and powers of the common people in their struggle with the privileged elite

Definition of 'Populism'

From: GCIDE
  • Populism \Pop"u*lism\, n. (U. S. Politics) The political doctrines advocated by the People's party. [Webster 1913 Suppl.]