Wall

an architectural partition with a height and length greater than its thickness

anything that suggests a wall in structure or function or effect

(anatomy) a layer (a lining or membrane) that encloses a structure

a difficult or awkward situation

a vertical (or almost vertical) smooth rock face (as of a cave or mountain)

a layer of material that encloses space

a masonry fence (as around an estate or garden)

an embankment built around a space for defensive purposes

surround with a wall in order to fortify