Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Berlin Wall a barrier first erected in 1961 that separated West Berlin from East Berlin, eventually fortified and extended to create a border between West Germany and East Germany, and ultimately opened to unrestricted transit on November 9, 1989, prior to being dismantled.
cell wall the rigid outermost layer of a plant cell, which is made of cellulose.
curtain wall an exterior wall that has no structural function.
dry wall a prefabricated wall or panel made of plaster dried between paper sheets or boards; wallboard.
fire wall a wall of fireproof material intended to prevent the spread of fire, as from one part of a building to another. [2 definitions]
Great Green Wall a multinational African initiative to fight desertification and land degradation by modification of land use, water harvesting, and the planting and maintenance of trees primarily along the southern edge of the Sahara Desert, a belt of land that stretches across the width of the continent. [2 definitions]
retaining wall a wall that is built to hold a mass of earth or water in place.
sea wall a wall or embankment strong enough to withstand the force of waves, built esp. to protect a shore from erosion.
Wall Street a lower Manhattan street in New York City that is the chief financial center of the United States. [2 definitions]
wall-to-wall covering all of a room's floor, as a carpet. [4 definitions]