2. Any turn or bend like that of the elbow, in a wall, building, and the like; a sudden turn in a line of coast or course of a river; also, an angular or jointed part of any structure, as the raised arm of a chair or sofa, or a short pipe fitting, turning at an angle or bent.
elbow is used adjectively or as part of a compound, to denote something shaped like, or acting like, an elbow; as, elbow joint; elbow tongs or elbow-tongs; elbowroom, elbow-room, or elbow room. at the elbow, very near; at hand. Elbow grease, energetic application of force in manual labour. Elbow in the hawse, scissors bent in the blade or shank for convenience in cutting. Out at elbow, with coat worn through at the elbows; shabby; in needy circumstances.