The term indefinite refers to something that is not clearly defined, specific or certain. It can also mean something that cannot be precisely determined, measured or predicted. In mathematics, an indefinite integral represents a family of antiderivatives for a given function rather than just one single antiderivative. Similarly, an indefinite article refers to any unspecific noun, such as "a" or "an", which is used before a general noun instead of a specific one. In grammar, the term indefinite refers to adjectives that do not limit or specify the noun they modify, unlike definite adjectives that narrow down the meaning of the noun.