lum·bar (lŭm'bər, -bär') adj. Of, near, or situated in the part of the back and sides between the lowest ribs and the pelvis. n. A lumbar artery, nerve, vertebra, or part.
Main Entry: lum·bar Pronunciation: 'l&m-b&r, -"bär Function: adjective 1: of, relating to, or constituting the loins or thevertebrae between the thoracic vertebrae and sacrum lumbar region> 2: of, relating to, or being the abdominal region lying on either side of the umbilical regionand above the corresponding iliac region