The meaning of WALL is a high thick masonry structure forming a long rampart or an enclosure chiefly for defense —often used in plural. How to use wall in a sentence.

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Walls have historically served defensive purposes, and the term "wall" originally referred to defensive walls and ramparts. Examples of famous defensive walls include the Great Wall of China and …

A wall of people or things is a mass of them formed in such a way that you cannot get through or past them: (Definition of wall from the Cambridge Academic Content Dictionary © Cambridge University …

1. Extremely unconventional. 2. Without foundation; ridiculous: an accusation that is really off the wall.

wall, structural element used to divide or enclose, and, in building construction, to form the periphery of a room or a building.

A wall is a long narrow vertical structure made of stone or brick that surrounds or divides an area of land. He sat on the wall in the sun. The well is surrounded by a wall only 12 inches high.