A 100% vegetarian or vegan (pronounced VEE-gan) is someone choosing a lifestyle free from animal products for the benefit of people, animals and the environment. They eat a plant-based diet free from all animal products. Many choose not to wear leather, wool, or silk. This can also be called a Herbivorous / Pythagorean diet.
Mostly Vegetarian Diet - a term used by those who wish to reduce the amount of animal products which they consume. People may start by removing all red meats from their diet believing them to be the most injurious 'foods' for the human body. Then they may gradually remove dairy, eggs, poultry and fish. Those who continue their journeys will eventually get to the stage where they are eating only plant-based foods.