Middle in web development refers to the central section of a webpage that is surrounded by other sections such as headers and footers. It is often used to display the main content of the page, providing a focal point for users.

Middle can also describe a specific portion of an element or object. In CSS, the margin property can be used to set the space around an element, with the auto value ensuring equal margins on both sides, effectively placing the element in the center of its container.

In programming, middle can refer to the manipulation of arrays or strings to extract or modify the elements in the middle. For example, finding the middle element of an array involves dividing the length by two and getting the element at that index.