national mediation board
National Mediation Board. An independent federal board that mediates labor–management disputes in the airline and railroad industries and provides administrative and financial support in adjusting grievances in the railroad industry. • The agency was created by the Railway Labor Act of 1934 to prevent interruptions in service. 45 USCA §§ 154–163. — Abbr. NMB. Cf. FEDERAL MEDIATION AND CONCILIATION SERVICE. [Cases: Labor Relations 451, 452. C.J.S. Labor Relations §§ 459–463.]