From Dictionary.com

lib·er·tine /ˈlɪbərˌtin, -tɪn/ Pronunciation Key - Show Spelled Pronunciation[lib-er-teen, -tin] Pronunciation Key - Show IPA Pronunciation

–noun

1.	a person who is morally or sexually unrestrained, esp. a dissolute man; a profligate; rake.

2.	a freethinker in religious matters.

3.	a person freed from slavery in ancient Rome.

–adjective

4.	free of moral, esp. sexual, restraint; dissolute; licentious.

5.	freethinking in religious matters.

6.	Archaic. unrestrained; uncontrolled.

---

[Origin: 1350–1400; ME libertyn <>lībertīnus of a freedman (adj.), freedman (n.), equiv. to lībert(us) freedman (appar. by reanalysis of liber-tās liberty as libert-ās) + -īnus -ine¹]

—Synonyms 1. roué, debauchee, lecher, sensualist. 4. amoral, sensual, lascivious, lewd.

—Antonyms 1. prude.