Il·lic'it adjective [ Latin illicitus ; prefix il- not + licitus , past participle of licere to be allowed or permitted: confer French illicite . See In- not, and License .] Not permitted or allowed; prohibited; unlawful; as, illicit trade; Found on http://www.encyclo.co.uk/webster/I/8
illicit 1. Not allowed by the law. 2. Considered wrong or unacceptable by prevailing social customs or standards. 3. Disapproved of or not permitted for moral or ethical reasons. Found on http://www.wordinfo.info/words/index/info/view_unit/4067/