Collier's New Encyclopedia (1921)/Article

ARTICLE, in grammar, a part of speech used before nouns to limit or define their application. In English a, or an, is usually called the indefinite article (the latter form being used before a vowel sound), and the, the definite article, but they are also described as adjectives. An was originally the same as one, and the as that. In Latin there were no articles, and Greek has only the definite article.