reflex

noun

1. 1. reflection, as of light
   2. light or color resulting from reflection
2. a reflected image, likeness, or reproduction
3. 1. Physiol. a reflex action
   2. any quick, automatic or habitual response
   3. ability to react quickly and effectively: a boxer with good reflexes

adjective

1. turned, bent, or reflected back
2. 1. coming in reaction or reflection: a reflex effect
   2. Physiol. designating or of an involuntary action, as a sneeze, resulting from a stimulus that is carried by an afferent nerve to a nerve center and the response that is reflected along an efferent nerve to some muscle or gland
3. Electronics designating or of a device, circuit, etc. that has two different functions
4. Geom. designating an angle greater than a straight angle (180°)

transitive verb

1. to bend, turn, or fold back
2. to cause to undergo a reflex process