The definition of a demagogue is a leader who plays to peoples' emotions and uses prejudices to gain power.
(noun)An example of a demagogue is Joseph Stalin.
See demagogue in Webster's New World College Dictionary
or demagog
noun
Origin: < Gr dēmagōgos, leader of the people < dēmos, the people (see democracy) + agōgos, leader < agein, to lead: see act
intransitive verb demagogued or demagoged, demagoguing or demagoging
See demagogue in American Heritage Dictionary 4
also dem·a·gog
nounOrigin:
Origin: Greek dēmagōgos, popular leader
Origin: : dēmos, people; see dā- in Indo-European roots
Origin: + agōgos, leading (from agein, to lead; see ag- in Indo-European roots)
. Usage Note: Among the nouns that the Usage Panel is loath to see used as a verb is demagogue, meaning “to speak about something in the manner of a demagogue.” Ninety-four percent reject it in the sentence The President will demagogue Medicare, unwilling to acknowledge that fundamental reforms need to be made. Resistance to the use of traditional nouns as verbs is sometimes strong, especially when the novel usages are associated with business or bureaucratic jargon.Learn more about demagogue