D defs.my
Entry 1 sense Webster, 1913

Illicit

/ĭlˌ-ĭs'-ət/ · Il·lic·it · IPA /ɪˈlɪsɪt/
01 a. Not permitted or allowed; prohibited; unlawful; as, illicit trade; illicit intercourse; illicit pleasure.
  1. 1.
    Not permitted or allowed; prohibited; unlawful; as, illicit trade; illicit intercourse; illicit pleasure.
    “One illicit . . . transaction always leads to another.” Burke.