Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun knee_jerk

1 sense of knee jerk

Sense 1
knee jerk, knee-jerk reflex, patellar reflex -- (a reflex extension of the leg resulting from a sharp tap on the patellar tendon)
       => reflex, reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction -- (an automatic instinctive unlearned reaction to a stimulus)