'Demagogue' definitions:

Definition of 'demagogue'

From: WordNet
noun
A political leader who seeks support by appealing to popular passions and prejudices [syn: demagogue, demagog, rabble-rouser]

Definition of 'Demagogue'

From: GCIDE
  • Demagogue \Dem"a*gogue\ (?; 115), n. [Gr. dhmagwgo`s a popular leader; commonly in a bad sense, a leader of the mob; dh^mos the people + 'agwgo`s leading, fr. 'a`gein to lead; akin to E. act: cf. F. d['e]magogue.] A leader of the rabble; one who attempts to control the multitude by specious or deceitful arts; an unprincipled and factious mob orator or political leader. [1913 Webster]