concerted activity npl: -ties
: an employee action (as canvassing other employees) that concerns wages or working conditions of others in addition to the employee and that contemplates group activity NOTE: Concerted activities are protected by the National Labor Relations Act and cannot be used as a reason to discharge or discipline an employee.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.