libertarian Meaning, Definition & Usage

  1. noun an advocate of libertarianism
  2. noun someone who believes the doctrine of free will

WordNet

Lib`er*ta"ri*an adjective
Etymology
See Liberty.
Definitions
  1. Pertaining to liberty, or to the doctrine of free will, as opposed to the doctrine of necessity.
Lib`er*ta"ri*an noun
Definitions
  1. One who holds to the doctrine of free will.

Webster 1913