In mathematics, "span" refers to the set of all possible linear combinations of a given set of vectors. For example, if you have two vectors in a two-dimensional space, their span includes all points that can be reached by scaling and adding these vectors together. This concept is fundamental in linear algebra and helps in understanding vector spaces. In a more general context, "span" can also describe the extent or range of something. For instance, the span of a bridge refers to the distance between its supports. This term is often used in engineering and architecture to indicate the structural reach of various elements.