(physics) An interface separating magnetic domains. / (astrophysics) A two-dimensional singularity hypothesized in string theory.

(history) A wall that parted the city of Berlin until 1989, constructed by the German Democratic Republic to keep East Germans from escaping to West Berlin.

(politics) Any barrier designed to keep people from crossing a border, e.g. the one proposed to keep people from crossing from Mexico into the United States.

Short for Great Wall of China. / (astronomy) Either of two identified areas containing hundreds of galaxies.

(transitive) To seal with a wall.

To separate with a wall. / (figuratively, by extension) To isolate completely.

The layer of muscles that surrounds the abdominal cavity and contains the abdominal organs.

plural of wall socket

A mains electricity power point mounted in or on a wall inside a dwelling or other building. / Any outlet or recess in a wall.

(marketing) In retail selling, a large, visually appealing display of products intended to attract the interest of customers.