There are multiple definitions - click on the translation that matches your context.

liberação

substantivo

full

clearance

noun

Definitions of clearance

the right of a ship to leave port, or the certificate issued by the harbour master showing the ship's right to leave port

Ships will receive clearance only after all paperwork is in order and fees and tax are paid.

the passage of a bill of exchange through a clearing house

The Bonds will be accepted for clearance through Euroclear France.

the approval (=a decision to allow something) that a particular transaction can be made

Clearance to the deal has been obtained from the European Commission.