I. ˌNational ˈLabor Relations ˌBoard, the BrE AmE abbreviation , NLRB
a US government organization that tries to settle disagreements between workers and managers, especially in large companies. There is a similar organization in the UK called ACAS.
II. NLRB, the /ˌen el ɑː ˈbiː $ -ɑːr-/ BrE AmE noun abbreviation for
National Labor Relations Board