White Space – Refers to the blank areas around items in a design. Sometimes referred to as “air”, it doesn’t have to be white, it’s just any area that isn’t occupied with text or graphic elements. Used correctly it can increase readability and impact. (See Negative Space to read about the difference between the two.)
Wire Frame – A method used to help aid the web design process. Wire frames, like they sound, are basic representations of web sites created so that design and layouts can be developed and explored rapidly.
WYSIWYG – What-You-See-Is-What-You-Get. The term originally arrived with the emergence of DTP and means that what is displayed on-screen when creating means that it will also appear the same when out-putted. Now it covers a great number of applications.