something that is left over after the remaining portion has been used or consumed, especially food that remains at the end of a meal, to be eaten later (often used as "leftovers");
e.g. He made enough stew that there were leftovers to eat the next day.
(adjective)
unused or unconsumed, surplus, extra, remaining;
e.g. Please save the leftover fabric so I can use it for something else.