/ Dictionary / Index L libertarian: Meaning and Definition of Find definitions for: lib•er•tar•i•an Pronunciation: (lib"ur-târ'ē-un), [key] — n. a person who advocates liberty, esp. with regard to thought or conduct. a person who maintains the doctrine of free will (distinguished from necessitarian). —adj. advocating liberty or conforming to principles of liberty. maintaining the doctrine of free will. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: libertarian (Thesaurus) Liberius Libertas Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language