Eagle, a gold coin of the United States of the value of ten dollars, and at present of the standard legal weight of 258 grains. Taking the dollar at 4s. l-1/2d., it is equivalent to £2 ls. 3d. English. Its name, of course, is derived from the fact that the American eagle is stamped on its obverse. Double, half, and quarter eagles are also coined, and in the earlier days of the Republic all these coins were sometimes issued by private persons, as well as by the Government.