1. (n.) A free thinker who lacks moral restraint\.
2. (n.) One of a sect of Anabaptists, in the fifteenth and early part of the sixteenth century, who rejected many of the customs and decencies of life, and advocated a community of goods and of women.
3. (n.) One free from restraint; one who acts according to his impulses and desires; now, specifically, one who gives rein to lust; a rake; a debauchee.
4. (n.) A defamatory name for a freethinker.
5. (n.) Free from restraint; uncontrolled.
6. (n.) Dissolute; licentious; profligate; loose in morals; as, libertine principles or manners.