1. Official, lawful, or authorized methods and procedures established by law for accomplishing something
The dispute should be resolved through legal channels.
A disputa deve ser resolvida através das vias legais.
2. Proper judicial or administrative procedures recognized by the legal system
He decided to pursue his claim via legal channels rather than taking matters into his own hands.
Ele decidiu perseguir sua reclamação pelas vias legais em vez de tomar a justiça em suas próprias mãos.