siding

• IPA^(key): /ˈsaɪdɪŋ/

side +‎ -ing (“material, collection”).

siding (plural sidings)

1. (Canada, US) A building material which covers and protects the sides of a house or other building.

   Ugh. If there's one thing I can't stand it's cheesy vinyl siding.

• cladding (UK, NZ, AU)

siding

1. present participle of side

   Whenever he hears an argument, he can't help siding with one party or the other.

side +‎ -ing (“derivative noun, having the quality of”).

siding (plural sidings)

1. (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 loading or unloading freight, storing trains or other rail vehicles; or to allow two trains on a same track to meet (opposite directions) or pass (same direction) (the latter sense is probably an American definition).
   • 1919, W. Somerset Maugham, The Moon and Sixpence, chapter 47

     They slept where they could, sometimes in an empty truck on a siding near the station, sometimes in a cart behind a warehouse; [...]

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

• private siding

siding

1. (anatomy) mole