SDLP, the /ˌes diː el ˈpiː/ BrE AmE
abbreviation for the Social Democrat and Labour Party; a political party in Northern Ireland, mostly supported by Catholics, which has fairly ↑ left wing ideas. Although the SDLP wants Northern Ireland to become part of the Republic of Ireland, it is completely opposed to the use of violence to achieve this aim. The SDLP had an important part in the peace talks in Northern Ireland in the 1990s.