1. A response or reaction based on logic, reason, and careful thought rather than emotion or impulse
His rational reaction to the crisis was to analyze all available data before making a decision.
Sua reação racional à crise foi analisar todos os dados disponíveis antes de tomar uma decisão.
2. In chemistry, a reaction that follows predictable chemical principles and laws
The rational reaction between the two compounds produced the expected results.
A reação racional entre os dois compostos produziu os resultados esperados.