Also found in: Thesaurus, Medical.
1. Lacking moral restraint, especially in sexual conduct.
2. Archaic Ignoring accepted rules or standards, as of prescriptive grammar.
[Latin licentiōsus, from licentia, freedom, license; see license.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.