1. Unauthorized or unlawful methods, pathways, or means of distribution, communication, or commerce that operate outside legal frameworks
The contraband was smuggled through illegal channels.
O contrabando foi trazido por canais ilegais.
2. Unlicensed broadcasting or communication networks that operate without proper regulatory approval
The pirate radio stations operated through illegal channels.
As estações de rádio piratas operavam através de canais ilegais.
3. Unofficial or clandestine routes used to circumvent legal restrictions or regulations
Money laundering often occurs through illegal channels.
A lavagem de dinheiro frequentemente ocorre através de canais ilegais.