Definition of "fanatic" []

• A person marked or motivated by an extreme, unreasoning enthusiasm, as for a cause. (noun)
• Fanatical. (adjective)

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.

• "Giving a whole new meaning to the term fanatic, this deranged devotee and No 1 fan of a romance-novel writer (James Caan), holds him against his will, forces a rewrite of the protagonist's fate and then sledgehammers his legs so he can't escape from her."
• "Sorry, but a fanatic is a fanatic, regardless of what sheepskin she wears."
• "The pope says many parts of the world are now facing threats to peace, including terrorism and what he calls fanatic fundamentalist."