elbow

v. shove with one's elbow, jostle, push

n. joint located in the middle of the human arm

The elbow-joint is a ginglymus or hinge joint. Three bones form the elbow joint: the humerus of the upper arm, and the paired radius and ulna of the forearm.The bony prominence at the very tip of the elbow is the olecranon process of the ulna.
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Elbow /el·bow/ 1. the bend of the arm; the region around the joint connecting the arm and forearm. 2. any angular bend. [more]Elbow - Community and Resources

Noun
1. hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped
(synonym) elbow joint, cubitus, cubital joint, articulatio cubiti
(hypernym) hinge joint, ginglymus, ginglymoid joint
(part-holonym) arm
(part-meronym) musculus articularis cubiti
2. a sharp bend in a road or river
(hypernym) bend, curve
3. a length of pipe with a sharp bend in it
(hypernym) pipe, pipage, piping
4. the part of a sleeve that covers the elbow; "his coat had patches over the elbows"
(hypernym) cloth covering
(part-holonym) sleeve, arm
5. the joint of a mammal or bird that corresponds to the human elbow
(hypernym) joint, articulation, articulatio
(part-holonym) foreleg
Verb
1. push one's way with the elbows
(hypernym) jostle, shove
(derivation) elbow joint, cubitus, cubital joint, articulatio cubiti
2. shove one's elbow into another person's ribs
(hypernym) nudge, poke at, prod
(derivation) elbow joint, cubitus, cubital joint, articulatio cubiti

(v. t.)
To push or hit with the elbow, as when one pushes by another.
  

(v. i.)
To push rudely along; to elbow one's way.
  

(v. i.)
To jut into an angle; to project or to bend after the manner of an elbow.
  

(n.)
The joint or bend of the arm; the outer curve in the middle of the arm when bent.
  

(n.)
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.
  

(n.)
A sharp angle in any surface of wainscoting or other woodwork; the upright sides which flank any paneled work, as the sides of windows, where the jamb makes an elbow with the window back.