siding

/ˈsaɪdɪŋ/
noun
  1. Material used to cover the outside walls of a building, such as wood, vinyl, or metal.
    • The house has new vinyl siding that looks like real wood.
    • The contractor installed white siding on the entire building.
    • We need to replace the old wooden siding because it is rotting.
  2. A short railway track connected to a main line, used for storing trains or loading and unloading.
    • The freight train was moved to a siding to let the passenger train pass.
    • The old siding is now used to store abandoned railcars.
    • Workers loaded the grain onto the train at the siding.
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