Indicates definiteness or indefiniteness of a noun, member of a small class of determiners.
Articles specify the grammatical definiteness of the noun, in some languages extending to volume or numerical scope. The articles in the English language are the definite articele the and the indefinite article a/*an*. Other languages, like French, have the partitive article de, used with mass nouns (Je ne bois pas de café). The partitive corresponds to the English determiner some.