1. to behave or conduct oneself in a logical, reasonable, and sensible manner based on reason rather than emotion
When faced with a crisis, it's important to act rationally rather than panic.
Quando confrontado com uma crise, é importante agir racionalmente em vez de entrar em pânico.
2. to make decisions based on logical thinking and evidence
The investor decided to act rationally and analyze the market data before investing.
O investidor decidiu agir racionalmente e analisar os dados do mercado antes de investir.