1. A legal or administrative decision that declares something null, void, or of no effect; the act of making something legally invalid
The court issued a voiding decision that cancelled the original contract.
O tribunal emitiu uma decisão de anulação que cancelou o contrato original.
2. In administrative law, a ruling that nullifies a previous administrative act or decision
The voiding decision by the regulatory agency invalidated the permit.
A decisão de anulação da agência reguladora invalidou a licença.