what is a width
Noun. 1. width-the extent of something from side to side. breadth. dimension-the magnitude of something in a particular direction (especially length or width or height).broadness, wideness-the property of being wide; having great width.. width-the extent of something from side to side. breadth. dimension-the magnitude of something in a particular direction (especially length or width or height). broadness, wideness-the property of being wide; having great width.