/ Dictionary / Index A ankle jerk: Meaning and Definition of Find definitions for: an'kle jerk" Pronunciation: [key] a reflex extension of the foot, caused by contraction of the muscles of the calf, resulting from a sharp tap on the Achilles tendon; Achilles reflex. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ankle-deep anklet Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language