sidewall

Definitions of sidewall
  1. noun
    a wall that forms the side of a structure
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    type of:
    wall
    an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure
  2. noun
    the side of an automobile tire
    “the car had white sidewalls
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    type of:
    side
    an extended outer surface of an object
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