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fundamentalist

If you love to talk about what a strict vegan you are, your friends might start calling you a fundamentalist, or a person who sticks very closely to a particular set of principles.

The word fundamentalist is used most often to talk about religion. As an adjective, it describes a very strict, literal interpretation of a religious text or set of beliefs, and the noun means a person who holds those firm, often extreme, beliefs. Fundamentalist is a relatively recent term, invented in the 1920s in the United States to describe a Protestant movement during that era.

Definitions of fundamentalist
  1. noun
    a supporter of fundamentalism
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    type of:
    Protestant
    an adherent of Protestantism
  2. adjective
    of or relating to or tending toward fundamentalism
    synonyms: fundamentalistic
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