1. Clear, specific, and fixed regulations or guidelines that are established and must be followed without ambiguity
The school has definite rules about uniform dress code.
A escola tem regras definidas sobre o código de vestuário uniforme.
2. Explicit standards or principles that leave no room for interpretation or exception
In chess, there are definite rules that govern how each piece moves.
No xadrez, existem regras definidas que governam como cada peça se move.