Definition of "drumbeater" [drumbeater]

• One that supports a cause, especially vehemently. (noun)

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.

• "Crowther may have been his era's foremost drumbeater for foreign film."
• "Robert BlyMinor poet who became chief drumbeater (so to speak) for the men's movement with his manifesto "Iron John.""
• "And she is clearly a Mannian-like drumbeater for such restrictiveness, for without it her study? would smoldering in the same ashes as the hockey stick."