From Longman Dictionary of Contemporary Englishinstepin‧step /ˈɪnstep/ noun [countable] 1 HBHthe raised part of your foot between your toes and your ankle2 DCCthe part of a shoe that covers your instep
Examples from the Corpus
instep• Insteps frequently smash into elbows and need bandaging, but they can be protected by shin or instep pads.• Forget about instep crampons or ones without forward facing points, which are only of interest to walkers.• Bend right leg and bring foot back and up, holding toot around instep and gently pulling heel in towards right buttock.• Seated, she put out one foot like a dancer, instep curved forward.• He arched his instep, admiring a blue vein.• However, I would suggest that you subsequently attack employing the ball of the foot rather than the injured instep.• The bag was resting on my insteps.• The hinge connecting the front and rear pieces sits under the instep and lessens the chance of failure due to the metal flexing. 