What is National Labor Relations Board?

Legal Definition
The National Labor Relations Board (NLRB) is an independent US government agency with responsibilities for enforcing US labor law in relation to collective bargaining and unfair labor practices. Under the National Labor Relations Act of 1935 it supervises elections for labor union representation and can investigate and remedy unfair labor practices. Unfair labor practices may involve union-related situations or instances of protected concerted activity. The NLRB is governed by a five-person board and a General Counsel, all of whom are appointed by the President with the consent of the Senate. Board members are appointed to five-year terms and the General Counsel is appointed to a four-year term. The General Counsel acts as a prosecutor and the Board acts as an appellate judicial body from decisions of administrative law judges.

The NLRB is headquartered at 1015 Half St. SE, Washington, D.C., with over 30 regional, sub-regional, and residential offices throughout the U.S.
-- Wikipedia
Legal Definition
An independent federal agency to insure employee rights to organize and bargain with their organizations., and for monitoring the business practices of private companies and their respective labor unions.