1. An automatic or involuntary reaction of the body to a stimulus, occurring without conscious thought or deliberation
The doctor tested the patient's reflex response by tapping their knee with a small hammer.
O médico testou a resposta reflexa do paciente batendo no joelho com um pequeno martelo.
2. A quick, instinctive reaction to something, often without time for consideration
Her reflex response to the sudden noise was to jump back in alarm.
Sua resposta reflexa ao ruído repentino foi saltar para trás assustada.