n. (Anat.) The great flexor muscle of the hip joint, divisible into two parts, the iliac and great psoas, -- often regarded as distinct muscles. [ 1913 Webster ]
n. [ Gr. &unr_; a muscle of the loin: cf. f. psoas. ] (Anat.) An internal muscle arising from the lumbar vertebræ and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas. [ 1913 Webster ]
v. i. To soar or mount up. Pope. [ 1913 Webster ]