A metaphor for a wall is powerful image used to describe barrier, obstacle, or protection that is not physical wall. Common metaphors include wall as emotional barrier, as in she built a wall around her heart meaning she closed herself off emotionally to protect from hurt. Wall as obstacle in life, as in hitting a wall meaning reaching point where progress stops. Wall as divide between people or ideas, as in wall between cultures meaning lack of understanding. Wall as protection, as in wall of support meaning strong support system protecting someone. In literature, wall can be metaphor for isolation, secrecy, or resistance. Robert Frost's poem Mending Wall uses wall as metaphor for boundaries between people. In politics, wall is metaphor for division or exclusion. So wall metaphorically represents any barrier that blocks communication, progress, or connection, or protection that shields from harm, depending on context.
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