Definition of Federal Register
The Federal Register, published daily, is the medium for making available to the public Federal agency regulations and other legal documents of the executive branch. These documents cover a wide range of Government activities. An important function of the Federal Register is that it includes proposed changes (rules, regulations, standards, etc.) of governmental agencies. Each proposed change published carries an invitation for any citizen or group to participate in the consideration of the proposed regulation through the submission of written data, views, or arguments, and sometimes by oral presentations. Such regulations and rules as finally approved appear thereafter in the Code of Federal Regulations.
That's the definition of Federal Register in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.