1. to confirm or approve formally, especially a treaty or agreement
The government ratifies the international treaty.
O governo ratifica o tratado internacional.
2. to give official sanction or validity to something
The parliament ratifies the constitutional amendment.
O parlamento ratifica a emenda constitucional.
3. to endorse or affirm something previously agreed upon
She ratifies the decision made by the committee.
Ela ratifica a decisão tomada pela comissão.