Tradução
espaço em branco
Minhas sugestões quanto a significado: de valor, de destaque
Significado
What those in the print business call "white space". You know the part in the ad that is blank. White space is also the part of the painting that is left blank. It makes what is said, or depicted, stand out more and have more meaning. In our business lives, it might make the service we deliver more valuable, the product better delivered, the time spent more enjoyable, the profit margin larger.
Fonte
http://www.ontargetmarketingcoach.com/knowledge.html
Outra explicação
White Space Isn't Wasted
One of the easiest graphic elements you have at your disposal is simply nothing. In design circles, this is called "white space." If you take a page and add white space judiciously, you'll greatly enhance the layout, even if you don't have fancy artwork or photographs. Never underestimate the value of white space. White space is probably the most overlooked graphic element, especially by people who are new to layout. Our tendency is to cram as much copy as possible onto the page. The reality is that the more we cram on the page, the less likely the reader will read anything, let alone have the visual resting space to digest what he or she has read.
The important thing here is to use white space intentionally. Decide when and how to best use it, just as you would any other graphic element. Take a look at how white space is used graphically in the sample newsletter layouts in "Creating Super Newsletters." You'll see how powerful it can be.
Fonte
http://www.agriculture.purdue.edu/agcomm/ontarget/archive/03_05.htm
