what is a article

Synonyms: Noun

• composition,
• essay,
• paper,
• theme

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Definition of article (Entry 2 of 2)

The, the definite article, refers to a specific entity or entities. The single entity may also be made up of multiple individual entities, as in, for example, the class of 1999, the Beatles or the IEEE (Institute of Electrical and Electronics Engineers).
There are only three articles, a, an and the. A and an, the indefinite articles, are used to refer to a single and unspecified entity. A is used with nouns that start with a consonant sound, as in a battery, while an is used with words that start with a vowel sound, as in an iPad.

References:

http://whatis.techtarget.com/definition/article
http://dujardin-immobilien.com/?uyd=report-essay-difference