Main Entry: lib·er·tar·i·an

Pronunciation: \ˌli-bər-ˈter-ē-ən, -ˈte-rē-\

Function: noun

Date: 1789

1 : an advocate of the doctrine of free will
2 a : a person who upholds the principles of individual liberty especially of thought and action b capitalized : a member of a political party advocating libertarian principles

— libertarian adjective

— lib·er·tar·i·an·ism \-ē-ə-ˌni-zəm\ noun