A leader who obtains power by means of impassioned appeals to the emotions and prejudices of the populace.
A leader of the common people in ancient times.
Usage Problem To speak about (an issue, for example) in the manner of a demagogue.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.