illicit
adjective
1. contrary to accepted morality (especially sexual morality) or convention
- an illicit association with his secretary
Similar word(s): adulterous, extracurricular, extramarital, unlawful
2. contrary to or forbidden by law
- an illegitimate seizure of power
- illicit trade
Similar word(s): illegal, illegitimate, outlaw, outlawed, unlawful
Sentences with illicit as an adjective:
- The bigamous marriage, while illicit, was not invalid.