Learn the meaning of boundary as a line or limit that separates something from another, or as a stroke in cricket that scores runs. Find synonyms, pronunciation, and usage examples of boundary in British and American English. 2. National Highways Authority of India (NHAI) has erected boundary walls as per the Ministry’s latest guidelines in several projects. However, the design of boundary wall needs to be improved from an aesthetic point of view. 3. What is Boundary Wall? Any wall, fence, or enclosing structure constructed on or directly next to a cadastral property border, as well as any other structure fastened to or on top of a boundary wall, including security devices such as spikes, barbed wire, razor wire, or electric fences. The meaning of BOUNDARY is something that indicates or fixes a limit or extent. How to use boundary in a sentence.