1. A fear or anxiety that is based on logical reasoning and realistic assessment of genuine danger or threat
A rational fear of heights keeps people from taking unnecessary risks on cliff edges.
Um medo racional de alturas impede que as pessoas corram riscos desnecessários à beira de precipícios.
2. Fear that has a valid, understandable cause rooted in actual circumstances rather than imagination
His rational fear of the approaching storm was justified by the weather forecast.
Seu medo racional da tempestade que se aproximava era justificado pela previsão meteorológica.