1. An area of activity, practice, or jurisdiction that violates laws or legal regulations
The company was operating in an unlawful field by selling unregulated pharmaceuticals.
A empresa estava operando em um campo ilícito ao vender produtos farmacêuticos não regulamentados.
2. A domain or sphere of action that is prohibited by law
They ventured into an unlawful field of business without proper licensing.
Eles se aventuraram em um campo de negócios ilícito sem licença adequada.