1. To nullify, void, or formally cancel a scheduled performance, show, or presentation
The theater decided to annul performance due to the lead actor's illness.
O teatro decidiu anular a apresentação devido à doença do ator principal.
2. To invalidate or declare null and void a completed performance in legal or formal contexts
The court ordered to annul performance of the contract terms.
O tribunal ordenou anular a execução dos termos do contrato.