1) Addition 
• (n.) The act of adding something in excess or something extraneous; also, something which is added in excess or extraneously.
Su`per·ad·di'tion noun The act of adding something in excess or something extraneous; also, something which is added in excess or extraneously. « This superaddition is nothing but fat.» Arbuthnot. 
superaddition The act of adding something in excess, extraneous, or above and beyond the normal.