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siding (plural sidings)

  1. A building material which covers and protects the sides of a house or other building (called cladding in the UK).
    Ugh. If there's one thing I can't stand it's cheesy vinyl siding.
  2. (rail transport) A second, relatively short length of track just to the side of a railroad track, joined to the main track by switches at one or both ends, used either for unloading freight, or to allow two trains on a same track to meet (opposite directions) or pass (same direction).


(railroad side track): railroad siding, sidetrack, lay-by (UK)



  1. Present participle of side.
    Whenever he hears an argument, he can't help siding with one party or the other.