society > inhabiting and dwelling > inhabited place > a building > furniture and fittings > seat > chair > [noun] > parts of chairs > arm (6)
spec. The arm or back of a chair. Obsolete.
transferred. An arm of a chair, made to support the elbow. Obsolete except in combinations.elbow-chair, n.
Either of the two parts of a chair, sofa, etc., which extend forwards and horizontally on either side of the seat and on which the arms of the…
a structure on which the arm is rested or supported.