1. An unscheduled or hastily arranged consultation, typically conducted without prior preparation or formal arrangement
The doctor conducted an impromptu consultation with the patient in the hallway.
O médico realizou uma consulta improvisada com o paciente no corredor.
2. A quick, informal meeting or discussion to seek advice or professional opinion on short notice
We had an impromptu consultation with the lawyer about the contract.
Tivemos uma consulta improvisada com o advogado sobre o contrato.