1. The official cancellation or annulment of a previously issued visa, rendering it null and void
The revocation of his visa prevented him from entering the country.
A revogação de seu visto impediu que ele entrasse no país.
2. An administrative or legal action by immigration authorities to withdraw visa privileges
The embassy initiated visa revocation proceedings due to fraudulent documents.
A embaixada iniciou procedimentos de revogação de visto devido a documentos fraudulentos.