We are taught various terms while attaining design education; however most of these are just words that we hear without understanding what significance they actually have.
Such terms and concepts usually fade without any traces from our memory. Today we are attempting to reinforce one such concept, which is negative space.
We will start with understanding what negative space actually is. In web design the space is of two types – negative and positive. In positive space every element of your website is included, like content, images, navigation etc, while negative space refers to empty space round content which keeps the elements separated and helps in structuring the way users interact with content placed in positive space.
Read more : http://www.miracl3.com/understanding-the-concept-of-positive-and-negative-in-website-design/