siding
US /ˈsaɪ.dɪŋ/
UK /ˈsaɪ.dɪŋ/
1.
material, such as wooden boards or vinyl, used to cover the exterior walls of a house or other building
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The house had new vinyl siding installed last summer.
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They chose cedar siding for its natural look and durability.
2.
a short track at the side of a main railroad line, used for coupling or uncoupling cars or for standing cars aside to allow others to pass
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The train pulled onto the siding to let the express pass.
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Freight cars were left on the siding overnight.