A small amount refers to a tiny or insignificant quantity, which is not enough to make a noticeable difference. It can be used in various contexts such as describing a sum of money, an amount of food, liquid, etc., when it is minimal or negligible. For example, if someone gives you a small amount of money as a gift, it means they have given you very little. Similarly, if you use a small amount of oil while cooking, it implies that the quantity used was not enough to make any impact on the dish. In summary, "small amount" refers to something that is below average or insufficient in size, quantity, or importance.