elbow
noun
hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped
a sharp bend in a road or river
a length of pipe with a sharp bend in it
the part of a sleeve that covers the elbow joint
“his coat had patches over the elbows”
the joint of a mammal or bird that corresponds to the human elbow
verb
push one's way with the elbows
shove one's elbow into another person's ribs
Source: WordNet 3.1, Princeton University