Definition of "instep" [in•step]

• The arched middle part of the human foot between the toes and the ankle. (noun)
• The part of a shoe or stocking covering the instep. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "First a cover and then a hot brick to the soles of her feet; but put it right under the instep, that is where the life is. …"
• "I explained, in turn, that, never having experienced a yaw in that locality, I was driven to conclude the hollow of the instep was the most painful place for yaw-culture."
• "Bar-rail instep, which is a fallen arch reversed, was a common complaint among us."