The basic definition of bread is baked dough made from grain and water; bread comes in different forms all over the world. Bread has been a vital part of the human diet since ancient times; the word for bread in ancient Egypt meant life. Most bread is actually alive due to the yeast used to make it rise. However, bread can also be leavened from additions of chemicals, such as baking powder or the combination of baking soda and an acid, or prepared unleavened (flat).
Bread comes all sorts of shapes, colors, textures and sizes. It can be sweet, grainy, soft or hard.