The term 'indefinite amount' refers to a quantity that is not specified or known. It can be used to describe an unknown or uncertain amount of something, such as money, time, or objects. The word 'SOME' is often used to refer to an indefinite amount, as it implies that there is a quantity but does not specify how much. Similarly, the word 'ANY' can also be used to refer to an indefinite amount, as it implies that there is at least one of something, but does not specify how many.