that which supplies a deficiency, or meets a want; a store; a supply.-that which fills up, completes, or makes an addition to, something already organized, arranged, or set apart; specifically, a part added to, or issued as a continuation of, a book or paper, to make good its deficiencies or correct its errors.-the number of degrees which, if added to a specified arc, make it 180¡; the quantity by which an arc or an angle falls short of 180 degrees, or an arc falls short of a semicircle.-to fill up or supply by addition; to add something to.