What is the meaning of "gluten free"?

A protein that is found in cereal grains such as wheat, rye, barley, spelt, and kamut, but NOT in rice, quinoa, corn, buckwheat, or millet. It is a more common allergen than most people are aware of. The condition in which the body creates an immune response to products containing gluten is called Celiac disease.

Great answers above!

Even people who aren't fully allergic to gluten often report feeling better, healthier, and more energetic after switching to gluten free baked goods.

Gluten free foodies have a HUGE community online, believe it or not. There are a lot of sites where you can order food — my favorite is http://www.heavenmills.com/

In addition to gluten free breads and cakes, some of these sites sell gluten free baking materials, so you can make your own good stuff!

Well, gluten is basically like grain.

Since grain is high in carbohydrates, it will make you gain weight faster, so usually dieters don't like gluten products. Another reason people don't want gluten products is because they are allergic.

where did you get the idea that its only in flour? its in most grains more so in wheat than any other

Wheat free.

some are allergic to gluten.