- A wall that forms the side of something.
- A side surface of an automobile tire, between the edge of the tread and the wheel rim.
- The side of a tire.
- If the puncture had been in the tread I could have had the tire patched, but it was in the sidewall and they can't fix that: they have to replace the whole tire.
- The wall forming the side of a structure.
- The wall forming the side of a racquetball court.
- well said