What is Articles Of Incorporation?

Legal Definition
Articles of incorporation, also referred to as the certificate of incorporation or the corporate charter, act as a charter to establish the existence of a corporation in the United States and Canada, and are filed with the Secretary of State, or other company registrar.

An equivalent term for limited liability companies (LLCs) in the United States is articles of organization. For terms with similar meaning in other countries, see articles of association.
-- Wikipedia
Legal Definition
The highest governing document in a corporation. Also known as the corporate charter, it generally includes the purpose of the corporation, the type and number of shares, and the process of electing a board of directors. The articles of incorporation must be filed with the state at the time of incorporation, and may be amended or repealed as permitted by law and the articles themselves.
See also
Legal Definition
The instrument by which a private corporation is formed and organized under general corporation laws. People v. Golden Gate Lodge, 128 Cal. 257, 60 Pac. 865.
-- Black's Law Dictionary