1. exceeding the required or usual number; extra or surplus
The company laid off supernumerary staff during the recession.
A empresa demitiu pessoal supranumerário durante a recessão.
2. a person employed in addition to the regular staff, especially a minor actor or extra in a theatrical production
He worked as a supernumerary in the opera house before getting a lead role.
Ele trabalhou como supranumerário na ópera antes de conseguir um papel principal.
3. something that exceeds what is necessary or required
These documents are supernumerary to the main argument.
Esses documentos são supranumerários em relação ao argumento principal.