1. the bottom part of a shoe or boot that touches the ground

Examples

• The outsole of my running shoes has excellent grip on wet surfaces.
• She checked the outsole for wear patterns to see how her foot strikes the ground.
• The hiking boot features a rugged rubber outsole designed for rocky terrain.
• After months of use, the outsole showed significant wear at the heel.
• The basketball shoe’s outsole provides superior traction on the court.
• He replaced his dress shoes because the leather outsole had worn through.