1. Support or endorsement provided by two or more parties acting together
The project received joint backing from both government and private investors.
O projeto recebeu apoio conjunto do governo e de investidores privados.
2. In bookbinding, a reinforced spine where two materials are joined together
The antique book featured a leather joint backing that had deteriorated over time.
O livro antigo apresentava um reforço de costura conjunta em couro que havia se deteriorado com o tempo.
3. Mutual financial or legal guarantee provided by multiple entities
The loan was approved thanks to the joint backing of three major financial institutions.
O empréstimo foi aprovado graças ao apoio conjunto de três grandes instituições financeiras.