A fortified and heavily guarded wall built in 1961 by the communist authorities on the boundary between East and West Berlin, chiefly to curb the flow of East Germans to the West. It was opened in November 1989 after the collapse of the communist regime in East Germany and subsequently dismantled.
Definition of Berlin Wall in US English:
Berlin Wall
proper noun
A fortified and heavily guarded wall built on the boundary between East and West Berlin in 1961 by the communist authorities, chiefly to curb the flow of East Germans to the West. It was opened in November 1989 after the collapse of the communist regime in East Germany and subsequently was dismantled.