1. Strong, reliable support or endorsement from a person, organization, or institution
The project has solid backing from the government.
O projeto tem apoio sólido do governo.
2. Firm financial or material support that can be depended upon
With solid backing from investors, the startup can proceed with confidence.
Com apoio sólido dos investidores, a startup pode prosseguir com confiança.
3. Substantial evidence or justification supporting a claim or decision
The theory has solid backing in scientific research.
A teoria tem apoio sólido na pesquisa científica.