The term "leftover" refers to any remaining amount or quantity of something that has been used, consumed or finished. It can be applied to a variety of situations such as food, money, resources, ideas, and more. For example, if you have cooked too much food for dinner and there is some left over after everyone has eaten, those leftovers would refer to the remaining portion that was not consumed. Similarly, if someone receives an unexpected amount of money or other resource, any excess beyond what they need can be referred to as a leftover. The term "leftover" is also used in a more general sense to describe anything that remains after something else has been used up or finished, whether it's still usable or not.