Hva er reflex? Hva er reflex? Bent, turned, or thrown back; reflected.Physiology Being an involuntary action or response, such as a sneeze, blink, or hiccup.Produced as an automatic response or reaction: reflex opposition to change. Something, such as light or heat, that is reflected.An image produced by reflection.A copy or reproduction.Physiology An involuntary response to a stimulus.Psychology An unlearned or instinctive response to a stimulus.Linguistics A form or feature that reflects or represents an earlier, often reconstructed, form or feature having undergone phonetic or other change.To bend, turn back, or reflect.To cause to undergo a reflex process.