1. to set someone free from imprisonment, slavery, or oppression
The soldiers liberated the prisoners from the camp.
Os soldados libertaram os prisioneiros do acampamento.
2. to free someone from social, political, or moral constraints
Education can liberate the mind from ignorance.
A educação pode libertar a mente da ignorância.
3. to release or set free from a confined space or situation
The valve liberates steam from the pressure cooker.
A válvula liberta vapor da panela de pressão.