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libertarian

[lib-er-tair-ee-uh n]
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noun
  1. a person who advocates liberty, especially with regard to thought or conduct.
  2. a person who maintains the doctrine of free will (distinguished from necessitarian).
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adjective
  1. advocating liberty or conforming to principles of liberty.
  2. maintaining the doctrine of free will.
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Origin of libertarian

First recorded in 1780–90; libert(y) + -arian
Related formslib·er·tar·i·an·ism, nounan·ti·lib·er·tar·i·an, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for libertarianism

libertarian

noun
  1. a believer in freedom of thought, expression, etc
  2. philosophy a believer in the doctrine of free willCompare determinism
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adjective
  1. of, relating to, or characteristic of a libertarian
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Derived Formslibertarianism, noun

Word Origin

C18: from liberty
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for libertarianism

libertarian

n.

1789, "one who holds the doctrine of free will" (opposed to necessitarian), from liberty (q.v.) on model of unitarian, etc. Political sense of "person advocating liberty in thought and conduct" is from 1878. As an adjective by 1882. U.S. Libertarian Party founded in Colorado, 1971.

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Online Etymology Dictionary, © 2010 Douglas Harper