The term 'Mexican Article' can be summarized as the Spanish definite article 'las', which is used to refer to feminine nouns in the singular form. It is one of the two Spanish definite articles, the other being 'el'. Las is used to refer to feminine nouns in the singular form, while el is used to refer to masculine nouns in the singular form. In Spanish, the definite article is used to refer to a specific noun, and it is placed before the noun it refers to.