2. Any member of a class of words that in many languages are distinguished in form, as partly in English, by having comparative and superlative endings: "Adjectives function as modifiers of nouns; such as, good, wise, perfect, beautiful, bad, sad, loud, etc."
"The three most common adjectives are the articles: a, an, and the. The a and an are the indefinite articles; they refer to any one of a class of nouns. The, is a definite article that refers to a specific noun."
"Examples of the indefinite articles, or adjectives, are a contest, and an opportunity. A definite article sample is the writer."