1. [N. Amer] Material applied to the outside of a building to make it weatherproof
   "The new vinyl siding improved the home's energy efficiency"
    
2. A short stretch of railway track used to store rolling stock or enable trains on the same line to pass
   "The freight train pulled into the railway siding to let the passenger train pass";
   - railroad siding [N. Amer], turnout [N. Amer], sidetrack, railway siding [Brit, Cdn]

1. Take sides for or against
   "Who are you siding with?"; "I'm siding against the current candidate"

Derived forms: sidings

Type of: align, array, building material, railroad [N. Amer], railroad track [N. Amer], railway [Brit, Cdn], railway track [Brit, Cdn]

Encyclopedia: Siding, Walhalla line, Victoria