Noah Webster's Dictionary 1. (p. pr.& vb. n.) of Side. 2. (n.) Attaching one's self to a party. 3. (n.) A side track, as a railroad; a turnout. 4. (n.) The covering of the outside wall of a frame house, whether made of weatherboards, vertical boarding with cleats, shingles, or the like. 5. (n.) 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.

Multi-Version Concordance Siding (3 Occurrences) Acts 14:4 At length the people of the city split into parties, some siding with the Jews and some with the Apostles. (WEY) Exodus 23:2 Thou shalt not follow a multitude to do evil; neither shalt thou bear witness in a cause to turn aside after a multitude to pervert justice; (See NIV) 1 Chronicles 12:8 And some of the Gadites, siding with David, went to his strong place in the waste land, great and strong men, trained for war, expert in the use of arms, whose faces were like the faces of lions, and they were quick-footed like roes on the mountains; (BBE)