LEAGUE, measure. A league is a measure of length, which consists of three geographical miles. The jurisdiction of the United States extends into the sea a marine league. See Acts of Congress of June 5, 1794; 1 Story's L. U. S. 352; and April 20, 1818, 3 Story's L. U. S. 1694; 1 Wait's State Papers, 195. Vide Cannon Shot.