Veganism is a type of vegetarian diet that excludes meat, eggs, dairy products and all other animal-derived ingredients. Many vegans also do not eat foods that are processed using animal products, such as refined white sugar and some wines.

Vegan refers to either a person who follows this way of eating or to the diet itself. That is, the word vegan can be an adjective used to describe a food item, as in, "This curry is vegan", or, it can be used as a noun, as in, "Vegans like cookies, too."