siding

n. 1. Attaching one's self to a party. [ 1913 Webster ]

2. A side track, as a railroad; a turnout. [ 1913 Webster ]

3. (Carp.) The covering of the outside wall of a frame house, whether made of weatherboards, vertical boarding with cleats, shingles, or the like. [ 1913 Webster ]

4. (Shipbuilding) The thickness of a rib or timber, measured, at right angles with its side, across the curved edge; as, a timber having a siding of ten inches. [ 1913 Webster ]