sidingPronunciation: /ˈsʌɪdɪŋ/Translate siding | into French | into German | into Italian | into Spanish Definition of siding noun 1a short track at the side of and opening on to a railway line, used chiefly for shunting or stabling trains. North American a loop line. South African a scheduled stop on a railway line, often in open country, for farming produce to be loaded and passengers taken on board. 2 [mass noun] North American cladding material for the outside of a building. siding in other Oxford dictionaries Definition of siding in the US English dictionary