Definition of "insole" [in•sole]

• The inner sole of a shoe or boot. (noun)
• An extra strip of material put inside a shoe for comfort or protection. Also called innersole. (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.

• "However, the insole is a really soft terry cloth material that feels a lot nicer on the feet than the usual faux leather."
• "A gel or padded insole can fix the problem by keeping foot in place."
• "The 7 left her orthopedic insole behind, inexplicably."