reflex
nounUK /ˈriː.flɛks/
US /ˈriː.flɛks/
A reflex is a quick movement your body makes without you thinking about it.
When the doctor tapped his knee, his leg gave a little kick as a reflex.
RELATED WORDS
OTHER MEANINGS
2. An ability to react quickly.
Good goalkeepers need fast reflexes.
3. A way of behaving that happens automatically from habit.
Answering his phone was a reflex after years of work.
4. Light or an image that is reflected back.
She saw the reflex of the moon in the still water.