1. (Science: anatomy) The joint, or the region of the joint, by which the fore limb is connected with the body or with the shoulder girdle; the projection formed by the bones and muscles about that joint.
2. The flesh and muscles connected with the shoulder joint; the upper part of the back; that part of the human frame on which it is most easy to carry a heavy burden; often used in the plural. Then by main force pulled up, and on his shoulders bore The gates of Azza. (milton) Adown her shoulders fell her length of hair. (Dryden)
7. An abrupt projection which forms an abutment on an object, or limits motion, etc, as the projection around a tenon at the end of a piece of timber, the part of the top of a type which projects beyond the base of the raised character, etc. Shoulder belt, a belt that passes across the shoulder.
Origin: OE. Shulder, shuldre, schutder, AS. Sculdor; akin to D. Schoulder, G. Schulter, OHG. Scultarra, Dan. Skulder, Sw. Skuldra.