Definitions
1.nounOne who advocates liberty, either generally or in relation to a specific issue."civil libertarian"
2.nounA believer in a political doctrine that emphasizes individual liberty and a lack of governmental regulation, intervention, and oversight both in matters of the economy (‘free market’) and in personal behavior where no one’s rights are being violated or threatened; also, a ‘classical liberal’, akin to an ‘anarcho-capitalist’.
3.nounA left-libertarian, an antiauthoritarian believer in both individual freedom and social justice (social equality and mutual aid), such as a social anarchist.
4.nounA believer in the freedom of thinking beings to choose their own destiny, i.e. a believer in free will as opposed to those who believe the future is predetermined.
5.adjectiveHaving the beliefs of libertarians; having a relative tendency towards liberty."A libertarian capitalist."
6.adjectiveRelating to liberty, or to the doctrine of free will, as opposed to the doctrine of necessity.