Reflex
Reflex explained in an easy to understand way:
Imagine you're walking in the park, and suddenly a strong gust of wind blows dust into your eyes, making you blink involuntarily. Just as your body reacts instinctively to protect your eyes from harm, a reflex is an automatic response to a stimulus without you having to think about it. In this scenario, the wind is like the stimulus, your eyes blinking is the reflex action, and your conscious mind is bypassed, just as it is in reflex actions such as a blink or a blush.
Practice Version
Reflex: An automatic response to stimulus without conscious control, like a blink or blush. Reflex. A reflex is a quick, involuntary action your body makes in response to a specific stimulus.