Medical Definition of ulnar nerve
: a large superficial nerve of the arm that is a continuation of the medial cord of the brachial plexus, passes around the elbow superficially in a groove between the olecranon and the medial epicondyle of the humerus, and continues down the inner side of the forearm to supply the skin and muscles of the little-finger side of the forearm and hand—see funny bone
Seen and Heard
What made you want to look up ulnar nerve? Please tell us where you read or heard it (including the quote, if possible).